but the solution to this may be a slight emendation of the diagnosis rather than a different interpretation of their generic affinities.

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Iphimedia haurakiensis, n.sp. (Figs. 69–104)

Length about 7 ½ mm. ovigerous female with 26 ova. Colour in spirit white, eyes yellowish-brown, suggestion of green (perhaps originally black) about body segments. Peraeon segment 7 and pleon segments 1 and 2 have strong paired dorsal flange-spines, a small hump preceding spines on pleon segments 1 and 2, also in middle of pleon segment 3, which has slight suggestion of rounded keel, splits dorsally either side of 1st urosome segment. Rostrum not quite reaching end of 1st segment of antenna 1 peduncle; eye-lobes have 2 separated teeth, the lower acutely produced (the 1st not shown in Fig. 73). Mouthparts well produced downwards.

Antennae. First: Peduncle, 1st segment width ¾ length, a few fine bristle-setae about distal angles, 4 strong spines ½ along superior margin; 2nd ⅔ 1st, width about ½ length, fine bristle-setae and spine superodistally, 2 spines inferodistally, spine and setae ½ along superior margin; 3rd shorter and narrower, 1 or 2 end setae; minute 2-segmented accessory flagellum. Flagellum of more than 17 segments, 1st longer than 3rd peduncle segment, narrower; others ½ length 1st, each with fine bristle-setae and 2 flaccid sensory setae superodistally. Second. Peduncle, 3rd segment as long as 4th, wider; both superodistally produced in short sharp tooth, setae about tooth base, spine also on 4th; about 4 spines mediodistally; 5th as long as 3rd and 4th together; 3 sets of small spines and several bristle-setae superiorly. Flagellum of more than 28 segments, 1st about ½ as long as 5th peduncle segment and narrower, twice as long as succeeding segments, which have tuft of bristle-setae each on superodistal angle.

Mouthparts. Upper Lip: Longer than wide, distally rounded with slight median notch. Lower Lip: Outer lobes long and apically acute, end and inner margins bristled, inner margins somewhat incised but this masked by fusion with quite large inner lobes. First Maxillae: Inner plate short, 5 plumose setae on inner distal margin; bristled especially on margins below the 11 finely-toothed end spines of outer plate. Palp reaching as far, 1st segment ⅔ length 2nd which is distally spine-setose. Mandibles. Long and slender, no spine row, molar process a small condyle on inner margin near base; left has long slender blunt accessory plate, right has none; palp of 3 slender segments, 2nd twice length 1st with 4 spine-setae distally; 3rd shorter than 2nd, about 10 spine-setae on inner margin, narrowing to blunt tip. Maxilliped: Basos and ischium have a few fine setae on outer margins. Inner plate little more than ½ length outer, subrectangular, width less than ⅓ length, outer margin has fine bristles distally, then 8–10 long plumose setae; tip bluntly rounded with jagged inner edge until straight inner margin is reached; this end portion also has about 8 shorter plumose setae, cleft margin has long fine setae. Outer plate somewhat lanceolate; distal ½ of outer margin, rounded end and distal ½ of inner all strongly fringed with short finely-plumose setae. Palp as long, merus width not quite ½ length, outer distal angle has strong tuft of long setae, inner margin several short single setae; carpus nearly as long, not nearly as wide; naked except for tuft of long setae on outer distal angle and on end margin of inner angle which is produced ½ along propod; propod slender, about ⅔ carpus length, end and inner distal margins strongly setose, a few long fine setae on outer margin.

Gnathopods. First: Sideplate subrectangular, width ½ length, angles rounded, anterior almost absent, posterior with 2 distinct serrations each with seta. Basos as long, width ¼ length, long and short fine setae on anterior margin; ischium length ½ basos, width nearly ½ length, naked Merus about as long and wide; carpus longer and proximally narrowed, arising proximally from merus; both naked. Propod about ⅖ basos length, width about ⅕ length; naked except for distal chelate portion; posterodistally produced in narrow knife-like process so slightly and coarsely toothed inner margin forms palm; about 5 strong plumose setae on process. Dactylos short, reaching as far as process, indication of 2 or 3 teeth on inner margin, small cap above tip; 2 very thick long plumose setae on dactylos. Second: Sideplate ovate-rectangular; width less than ½ length, anterodistally arcuate to posterodistal 2 serrations; basos as long, width less than ¼ length, margins have fine bristle-setae. Ischium nearly ½ basos length, fine bristle-setae on distal ½ of anterior margin. Merus somewhat subtriangular, ⅓ basos length, width ½ length; fine bristle-setae anterodistally and on posterior margin. Carpus nearly ½ basos length, width ⅓ length, a few fine bristle-setae posteriorly. Propod as long, width ¼ length, widening slightly distally, minutely subchelate—almost chelate—with oblique palm, 3 small teeth on outer tip of posterodistal angle; slender curved dactylos not over-reaching palm; a few setae on anterior margin and especially distally around dactylos base, on palm and posterior margin especially, in sets of 2 and 3 along most of posterior margin; surface in parts very finely striated.

Peraeopods. First: Sideplate subrectangular, width about ⅔ length, anterodistal angle broadly rounded and exceedingly minutely toothed, anterior margin convex, posterior concave, posterodistal angle has 2 distinct serrations each with seta. Basos slightly shorter, width about ⅖ length, spine or 2 on distal angles,

a few fine marginal setae. Ischium subrectangular, ⅖ basos length, more or less naked. Merus piriform, ½ basos length, anterior margin convex, proximally constricted, pair of spines medially and distally on posterior margin; groups of 2, 1 and 3 spines anteriorly. Other segments missing. Simple pendulous gill about basos size; very large ovate seta-fringed broodplate. Second: Much the same but sideplate widens slightly concavely posteriorly to about ¾ width, is excavate above that; distal portion has a few minute setae. Third: Sideplate anterior lobe rounded, almost as deep as subrectangular posterior lobe, distal margin of which has several minute setae, posterodistal angle 2 small spines. Basos ovate, nearly as long as sideplate posterior lobe, not quite as wide as long, straight anterior margin has about 7 stout spines, a few setae; posterior mostly straight but rounding evenly distally, several minute setae and serrations proximally and distally. Ischium and merus like peraeopod 1 in reverse, but with 3 and 4 sets of spines anteriorly, 5 sets posteriorly on merus. Fourth: Sideplate trapezoid, wider than deep, posteroproximal angle rounded, posterodistal produced a little to acute point; about 3 stout spines on distal margin proximally, 2 minute setae and serrations near distal angle; posterior margin has triangular scale-teeth as in Maoriphimedia hinemoa. Basos ovate, slightly longer than wide and much longer than sideplate; convex anterior margin has a few setae, 7 or so stout spines, single except on angle; convex posterior margin has number of fine setae and serrations in opposing directions either side of small acute projection about ⅔ down margin. Merus and ischium as in Pr. 4, other segments missing. Fifth. Sideplate small, subrectangular, wider than deep, posterodistal angle a little produced in acute point. Basos at least twice as deep as sideplate, as wide as deep; about 10 strong spines on convex anterior margin, concave posterior has numerous small serrations with fine setae, a little produced to small acute posterodistal tooth. Ischium and merus as before, more strongly spined, other segments missing.

Epimeral Plates. First: Ovate, distally rounded; 4 strong spines anterodistally. Second: Subrectangular, deeper than wide, anterodistally more or less rounded with 3 strong spines ventrally; posterodistal angle produced to short acute tooth. Third: Subrectangular, wider than deep, anterodistal angle rounded, straight ventral margin has 3 strong spines anteriorly, posterodistal angle has small sharp produced tooth, a second stronger upturned tooth ½ along posterior margin, margin above this tooth concave and also between it and posterodistal angle, the latter portion of margin finely serrate with small setae. The dorsal spine-flanges, illustrated as viewed from above (Figs. 93–96) when flattened, have finely toothed margins. The marginal surfaces and the dorsal surfaces corresponding to the humps between the flanges previously mentioned have minute conical teeth as figured and in places triangular scale-setae.

Uropods. First: Biramous, rami subequal, a little shorter than the peduncle, peduncle outer distal angle sharply produced, inner also acute but not as strong, about 5 strong spines on inner dorsal margin, 8 on outer. Rami slender, distally notched either side of tip of inner ramus, one notch only near tip of outer ramus, 6 spines on inner margin of inner ramus, 3 on outer margin; none on inner margin of outer ramus and 4 on outer. Second: Inner ramus as long as peduncle, outer shorter, tips of both notched as above, inner has 4 spines either margin, outer margin is also minutely toothed, outer ramus has 3 spines on outer margin; peduncle has 1 spine mid-ventrally, 4 dorsally. Third: Damaged. Peduncle ½