2458 Bulletin 4.7, United States National Museum. 



932. EMBRYX, Jordan & Evermann. 

 Embryx, JORDAN & EVERMANN, new genus (crotalinus). 



This genus differs from Lycodopsis in the very slender body, the depth 

 being 12 to 16 times in the length, and especially in the ventral position of 

 the lateral line which is faint and incomplete, only the anterior descend- 

 ing portion developed. Deep seas, (er, in; fipv'E,, abyss.) 



a. Ventrals nearly as long as eye; head 6| in length; no scales on head. 



CRASSILABRIS, 2813. 



aa. Ventrals shorter than pupil ; head 5 in length ; head with some scales. 



CROTALINUS, 2814. 



2813. EMBRYX CRASSILABRIS (Gilbert). 



HeadGf; depth 16; maxillary reaching vertical from front of pupil, 3 

 in head; exposed portion of eye 6; snout 4; width of snout 3. Body 

 exceedingly slender. Occiput flat, forming a right angle with the descend- 

 ing cheeks, the snout short and wide, the upper lip conspicuously thick- 

 ened and fleshy on the sides. Upper jaw with a single series of rather 

 large, distant teeth ; mandible with a broad patch of cardiform teeth ante- 

 riorly, which becomes abruptly constricted on middle of lateral portion of 

 jaw, the inner series alone continued backward toward angle. Palate 

 smooth. Head not conspicuously excavated with mucous canals; series 

 of pores present on mandible and sides of head. Gill openings continued 

 forward to below pectorals, and about to vertical from middle of opercle ; 

 the width of the isthmus the length of slit. Opercular flap with a wide 

 niembranaceous border, produced backward and largely covering base of 

 pectorals. Gill rakers very little developed, about 12 movable rudiments on 

 horizontal limb of arch. Origin of dorsal in front of middle of pectorals, 

 slightly farther from occiput than is the latter from front of eye ; distance 

 from origin of anal to tip of snout 3 in total length ; ventrals nearly as 

 long as eye, inserted under middle of opercle; pectorals with 14 or 15 

 rays, the upper portion of flu longest, the lower rays rapidly shortened, 

 the longest rays ^ as long as head. Scales small, circular, covering nape, 

 breast, and under side of pectorals, but absent on head. Lateral line 

 single, inconspicuous, running below middle of sides, ventral in position, 

 the pores not developed on the scales. Color light brownish above, dark 

 below; lower side of head, margins of snout, gill membranes, part of 

 opercles, and margins of vertical fins jet black; ventrals and posterior 

 face of pectorals black; anterior face of pectorals light glaucous blue, 

 margined with black; lining of mouth and gill cavity and peritoneum 

 black. Pacific coast of southern California. A single specimen, 12 inches 

 long, from Albatross Station 2839. (Gilbert.) (crassus, thick; labrum, lip.) 



Lycodopsis crassilabris, GILBERT, Proc. U. S. Nat. Mus. 1890, 106, off southern California. 

 (Type, No. 44280. Coll. Albatross.) 



2814. EMBRYX CROTAL1XUS (Gilbert). 



Head 5; depth 12; maxillary reaching to behind middle of pupil, 2 in 

 head; eye 6; interorbital width 14; snout 4. Body very slender, with 



