2432 Bulletin ^7 , Ihiited States Natio7ial Museum. 



broadly united, wholly free from isthmus. Dorsal of spines only. Anal 

 with 2 spines. Ventral with 1 spine and 3 Avell-developed rays. Lower 

 pectoral rays longest, as in LeptocUnus. North Pacific. (TcXeHro?, enfolded; 

 /3pdyxo'^, gill.) 



•27S7. PLECTOBRANCHUS ETIDES, Gilbert. 



Head rather long. 4f in length, extending well beyond origin of dorsal 

 fin; depth about 11. D. LVI; A. II, 34. Body very slender, the depth 

 nearly constant throughout. Caudal peduncle without free portion, its 

 depth 2^ in tliat of body. Upper jaw with a broad inner baud of minute 

 teeth in front and on the sides, the outer series enlarged, 2 in the front of 

 the jaw distinctly canine-like; teeth in the lower jaw similar to the outer 

 series above, in a single series laterally, forming a patch in front of jaw, 

 where 2 of them are much enlarged canines, the largest teeth in the jaws; 

 vomer and palatines with bands of small but very evident teeth. Eyes 

 large, close together, the iuterorbital space I pupil. Orbit 3f in head, 

 longer than snout. Posterior nostril with a short flap, the tube obsolete. 

 Mouth large, somewhat obli(|ue, maxillary reaching middle of orbit, 2,t in 

 head. Top of head with very large pores, a series running backward from 

 each eye, the two joined by a cross series on occiput. Body covered with 

 very small cycloid scales, including belly, nape, breast, and cheeks, those 

 on breast and cheeks not imbricated; lateral line without visible pores. 

 Spinous dorsal beginning well forward, the distance from its origin to 

 nape less than from latter to posterior margin of orbit. Anterior spines 

 short, but fully united by membrane, the longest spine 3i in head; mem- 

 brane of last spine reaching base of upper caudal rays; origin of anal 

 very slightly in advance of middle of body ; anal Avith 2 short, sharp 

 spines, the rays longer, their terminal ^ free from membrane; last anal 

 ray connected with base of lower caudal ray ; ventrals well developed, 

 nearly i head ; pectorals with lowermost rays al>rupt]y h'ngthened, f head ; 

 caudal short, rounded, little more than ^ head. Color dusky olive above, 

 lighter below; sides crossed by about 25 narrow white bars, narrower 

 than interspaces; 3 equidistant dark blotches near back, each double, 

 the two halves occupying contiguous interspaces between white bars; 

 branchiostegal membrane black ; head without markings; pectorals white 

 at base, the distal half black, margined with white; ventrals white; dor- 

 sal with alternating oblique bars of white and blackish, 2 jet-black 

 roundish spots on its posterior portion; caudal whitish at base, then 

 dusky, margined with white, its Tipper ray jet-black; anal light at base, 

 becoming black at edge of membrane, the free tips of rays white. Coast 

 of Oregon. A single specimen, 4 inches long, from Albatross Station 3064, 

 in 46 fathoms. (£uez5?)5, comely.) 



Plectohranchvs eoicles, Gilbert, Proc. U. S. Nat. Mus. 1890, 102, coast of Oregon, at 

 Albatross Station 3064. (Coll. Albatross.) 



916. LEPTOCLINUS, Gill. 



Ctenodon, Nilsson, Skandinav. Faun., iv, 190, 1853 (maculatus) (name three times* pre- 

 occupied) . 

 Leptoclinus, Gill, Proc. Ac. Nat. Sci. Phila. 1864, 209 (aeuleaiue). 



* Ctenodon, Wagler, 1830, a lizard ; Ehrenberg, 1838, a rotifer, and Swainson, 1839, a flab. 



