454 Bulletin 47, United States National Museum. 



and less voluminous opercular flaps. The eye is comparatively much 

 smaller (18 in total length), and is nearer the upper profile of the head. 

 The vertical fins are stronger and more muscular, and are heavily scaled 

 at their bases. Lateral line nearly straight. Maxillaries slender, not 

 expanded posteriorly. 



For the second group as above indicated we suggest the name Mitchillina. 

 (In honor of the faithful and enthusiastic ichthyologist, Samuel Latham 

 Mitchill, United States Senator from the State of New York, 1804-1809, 

 the first to study systematically the fishes of New York Harbor.) 



747. MITCHILLINA BAIBDII (Goode & Bean). 



Head4; depth 5^; eye 41, D. 22; A. 25; P. 12; V. I, 9; pyloric coeca 

 15; B. 6; scales 7-65-11. Body rather elongate; head moderately com- 

 pressed, subconical, the lower jaw included; maxillary extending nearly 

 to below middle of eye; eye large, as long as snout. Dorsal inserted 

 slightly in advance of anal. Uniform indigo-blue, the color extending 

 to the inside of the mouth and the gill membranes. Length 24 inches. 

 Grand Banks; dredged at a depth of 200 fathoms. (Goode & Bean.) 

 (Named for Professor Spencer Fullerton Baird, then at the head of the 

 United States Commission of Fish and Fisheries.) 



Alepocephalus bairdii, GOODE & BEAN, Proc. TI. S. Nat. Mus., 1879, 55, Grand Banks of New- 

 foundland ; (Type, No. 22468. Coll. Christian Johnson) ; JORDAN & GILBERT, Synopsis, 257, 

 1883 ; GOODE & BEAN, Oceanic Ichthyology, 38, 1895. 



226. BATHYTROCTES, Giinther. 



Bathytroctes, GUNTHER, Ann. Mag. Nat. Hist., 1878, 249, (microlepis). 



Body rather elongate, compressed, covered with moderate scales. Mouth 

 wide, extending to below middle of eye, which is large ; maxillary with 

 series of minute teeth, like those on premaxillary, mandible, vomer, and 

 palatines ; tongue toothless. Dorsal and anal moderate, the dorsal nota- 

 bly longer than anal and inserted considerably in front of the latter. 

 Gill rakers lanceolate. Deep sea. (fiadve, deep ; rpw/crj/f , one who gnaws. ) 



748. BATHYTROCTES STOMIAS, Gilbert. 



Head 3f ; depth 5| \ eye small, 6i ; snout 3f. D. 17 ; A. 14 ; P. 9 ; scales 

 9-57-10. Mouth much larger than in other species, the front of eye over 

 middle of upper jaw. Body slender, the depth of caudal peduncle half that 

 of body. Premaxillaries extended forward, making a triangular projec- 

 tion, as in LaUdesthes', maxillary If in head; teeth uniform, incurved, 

 depressible. Top of head with a deep lengthwise groove from nape to 

 snout, a large mucous canal which borders it posteriorly opening above 

 eye. Gill rakers 5-f 13, long and slender, the longest f eye. Dorsal 

 beginning before vent ; the anal inserted slightly behind its middle ; cau- 

 dal forked. Dark brownish, the fins, etc., black. Length 13 inches. 

 Coast of Oregon, in 877 fathoms, (stomias, large-mouthed.) 



Bathytroctes siomias, GILBERT, Proc. U. S. Nat. Mus., 1890, 53, Coast of Oregon, in 877 fathoms, 

 Albatross station 3074. (Type, No. 43081. Coll. Gilbert.) 



