lordati and Evcrvtanii. — Fishes of North America. 453 



base under anterior portion of dorsal, the length of its base about f 

 that of dorsal. The caudal fin has its median rays as long as the diameter 

 of the eye, and the external rays at least -\, the total length of the fish. 

 The pectoral commences at a distance from the snout equal to i of the 

 length of the body. The ventrals are inserted considerably behind the 

 middle of the length (0.57), and appear to have been at least as long as the 

 diameter of the orbit. The type was obtained by the Albatross from 

 station 2035, at a depth of 1,362 fathoms. (Goodo Sc Bean.) (productus, 

 draw7i out.) 

 Alciwrcplidliis producliis, GiLL, Proc. U. S. Nat. Mu8., 1883, 20G, Gulf Stream at Albatross .<!ta- 



tiou 20:5o, iu 1,362 fathoms; (Type, No. 33341. Coll. Alhatro.«s); Goode & Be.\n, Oceanic 



Ichthyology, 37, fig. 4G, 18!)5. 



745. ALEPOCEPHALUS AGASSIZII, Goodo & Bean. 



Head 3 ; depth 5 ; eye 3^. D. 15 ; A. 17 ; scales 10-90-11. Body a little 

 deeper than in MitchiUina hairdii. Head compressed, the snout conically 

 elongate, the lower jaw slightly produced ; width of head fH in length of 

 body (12 in M. hairdii). Scales parchment-like. Dorsal inserted directly 

 above vent, the distance from its origin to base of caudal ^ its distance 

 from front of eye; anal inserted under second ray of dorsal. Length of 

 pectoral equal to diameter of eye, lOi in body. Ventral about ^ 

 of head. Dusky; head and fins nearly black. Gulf Stream, latitude 30°, 

 in 922 fathoms. (Goode & Bean.) (Named for Professor Alexander 

 Agassiz, iu whose deep-sea researches the species was obtained.) 

 Alepocephalus wjasslrji., Goode & Bean, Bull. Mus. Comp. ZoiJl., 1882, 215, Gulf Strearr. ; Goode 

 & Bean, Oceanic Ichlhyology, 37, 1895. 



746. ALEPOCEPHALUS TENEBROSUS, Gilbert. 



Head 3; depth 4| to 5; eye 4i. D. 17; A. 17; P. 10; scales 16-90-1(1, 

 55 tubes in l^iteral line. Allied to A. agassi:;ii. Body compressed, 

 elongate ; maxillary reaching front of pupil, its length from snout 2! in 

 head ; teeth in single series. Snout short, compressed, 3f in head. Dor- 

 sal ending slightly before anal ; pectoral 2^ in head, much longer than 

 eye. Scales of lateral line much enlarged, forming a raised ridge. Uni- 

 form blue-black. Santa Barbara Channel, California, at 359 to 822 

 fathoms. (Gilbert.) (tenehrosus, dusky.) 



Alepocephalus tenehrosun, Gilbert, Proc. U. S. Nat. Mus., 1801, 540, Santa Barbara Channel. 

 (Coll. Gilbert.) 



22$. MITCHILLINA, Jordan & Evermann. 



mUcliilUim, Jordan it Evermann, new gonns, (liainlii). 



In discussing the species of Alepocephalus, Goodo and Bean make the 

 following observations: 



There are two distinct groups in Alepocephaliin, probably of subgeneric 

 value. The first group includes the type, A. rostratus, Kisso. It is 

 characterized by a somewhat short, compressed l>ody, large head, with 

 extended membranaceous ilaps, and by short dorsal and anal fins, similar 

 in size and shape and nearly opposite each other. 



./. hairdii represents another tyjie, having a stout body, about as high 

 in proportion to its length as in J. ugassizii, etc., but with a smaller head 



