Page image

posterior slightly concave, posterodistally produced to merus in small flange; width 2/3 length, band of fine bristles slightly set in from posterior margin. Ischium as wide as long, length 1/4 basos, long plumose setae anterodistally. Merus almost linear, width 1/2 length, length more than 1/2 basos, spine on anterodistal angle, 1 or 2 spines and setae posterodistally, 1 and 2 setae on posterior margin. Carpus slightly narrower but as long, linear, 2 or 3 spines on posterodistal angle; 4 groups of 1 to 4 increasingly longer spines anteriorly. Propod linear, 2/3 basos length, width 1/3 length, 4 pairs of long spines on anterior and 3 on posterior margin, 1 long and 2 short on anterior angle, 1 short and 2 much longer than dactylos on posterior Dactylos as in Pr. 3. Fifth: Basos anterior margin straight, group of about 4 setae proximally, spine and 3 spine-setae distally; posteriorly expanded to wide strongly convex flange reaching carpus, as wide distally as anterior margin is long, flange a little longer, slightly serrate marginally. Basos as long as other segments less dactylos; ischium produced triangularly 1/3 down merus, margins convex, long spine-setae anterodistally; ischium and merus each approximately 1/4 basos length, as wide as long, spine-setae on slightly convex merus anterior margin, straight posterior margin naked Carpus about merus length, propod slightly longer, segments successively narrower; about 6 long regular and 3 short spine-setae on carpus anteriorly, seta at 2/3 posteriorly, 3 long setae on distal angle; spine-seta on propod posterodistal angle almost as big as dactylos, about 6 anteriorly; dactylos as before. Pleopods Short plumose seta beside the two simple coupling spines, rami much longer than peduncle, inner the shorter, of 13–16 segments (3rd). Epimeral Plates. First: As wide as long, anterior margin concave, posterior convex and parallel, ventral slightly convex, angles rounded Second: Subsquare, anterior margin slightly concave, posterior convex, anterodistal angle rounded, posterodistal much sharper, about 6 plumose setae midway on ventral margin. Third: Wider than deep, like second but posterodistal angle strongly produced, posterior margin straight, as though rectangular piece punched out from posterior surface, about 8 plumose setae on ventral margin. Uropods. First: Rami as long as peduncle, peduncle has 5 long spines on outer dorsal margin, 1 on inner, inner ramus with 2 spines proximally, outer naked. Second: Subequal naked rami longer than peduncle, which has 11 long spines on outer margin, 1 on inner. Third: Peduncle 1/2 length subequal rami, about 9 spines on slightly lobed distal margin, outer ramus of 2 segments, 2nd 1/4 length 1st and spine-like with 1 long and 1 short terminal seta, seta on outer distal angle of 1st; inner lanceolate, margins of inner and inner margins of outer ramus slightly serrate and very minutely spined. Telson: Cleft to base, long lobes with 2 plumose fine setae 1/3 along margins; 1 very stout and 1 smaller spine plus 1 or 2 plain and plumose setae distally. Male Antennae. First: Like female, but flagellum of 8 segments, strongly bristled patch on inferodistal margin, 1st 4 main flagellar segments with large stalked radially striated calceoli arising 1/2 along. Second: Third and 4th segments as in female, but fine bristle patch superodistally on 3rd, tract of bristles across superior surface of 4th; 5th inferiorly convex and widest distally, inferodistally rounded with 6 or so small setae, slightly longer than 4th, 2 spines with 4 calceoli on superior margin, 2 or 3 plumose-tipped setae beside each; the 31 flagellar seg-