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|A. Inner ventral rays united by membrane free from abdomen||Echeneis.|
|AA. Inner ventral rays attached to abdomen by membrane||Remora.|
Genus Echeneis Linnaeus.
Echeneis lineata Menzies. (Plate 96, fig. 2.)
Echeneis lineata Menzies, Trans. Linn. Soc., vol. 1, p. 187, tab. 17, fig. 1, 1791; Guenther, Hist. of Echeneis, Ann. Mag. Nat. Hist., ser. 3, vol. 5, No. 29, p. 398, May, 1860.
Br. 9; D. i/XXXV; A. i/XXXIII; P. xviii; V. i/V; C. xii/3/2.
Depth of body 14 in length to hypural joint, head 7 in same. Disc rather longer than head, 7 ¼ in length to hypural joint. Eye 5 ½ in head or 2 in snout. Interorbital space 3 ½ times width of eye. Width of caudal peduncle 4 ½ in head.
Body elongate, covered with small scales partly embedded in the skin. Dorsal surface flattened for some little distance behind head. Sides also flattened below origins of vertical fins for a very short distance, but anterior and posterior to this they are much rounded.
Head depressed, tapering at jaws, and bearing an adhesive disc which contains 11 laminae, each margined with sharp closely-set cardiform tooth-like processes. The disc extends from posterior margin of maxillary to some little distance on to neck. Lower jaw extends beyond upper; it is flat and broad. Villiform teeth in both jaws, rather more numerous and crowded in lower than in upper. Teeth also present on vomer, palatine bones, and tongue. Eye of medium size, with a prominence in front. Maxillary extends backward as far as posterior nostril. Gills 4; gill-rakers 9, on lower half of anterior limb. Origin of dorsal fin vertically above that of anal, its length subequal with distance from origin to posterior margin of adhesive disc, and its last ray is produced. Anal similar to dorsal, but a trifle lower. Ventral situated below middle of pectoral. Pectoral high, almost in line with top of head. Middle caudal rays long, convex.
Colour.—Top of head and body as far as below middle of height dark blackish-blue, with a silvery lateral streak passing behind eye and pectoral and along side to caudal. Lower half of head light cream, almost white. Lower sides and belly cream-white. Dorsal fin nearly all black, tips of first to ninth rays being dull white. First to ninth rays of anal are yellowish-white, the remainder being smoky, getting gradually darker backwards but not so dark as dorsal. Pectoral dark-bluish, with a light bluish-green patch in the centre. Ventrals yellowish-white. Caudal with its outer rays yellowish-white at base, pure-white distally, all the middle rays being black.
Described and figured from a specimen 467 mm. long to hypural joint. Head, 65 mm.; eye, 12 mm.; greatest depth of body, 35 mm.; length of middle caudal rays, 64 mm.; length of adhesive disc, 70 mm.; anterior width of same, 20 mm.; posterior width, 30 mm.
Locality and Distribution.—One fine specimen received from the Bay of Islands, Auckland Provincial District, in April, 1923. This I believe to be the first record of the species being found in New Zealand waters. Guenther records it from the Atlantic and Pacific Oceans between the tropics.