530 Bulletin 47, United States National Museum. 



than that of head; anal feeble. Several specimens were obtained by 

 the Albatross at about 40 N. latitude, 70 W. longitude, at a depth of 

 400 to 1,356 fathoms. (Goode & Bean.) (evpvf, wide; on/;, eye.) 



Batliylagus euryops, GOODE & BEAN, Oceanic Ichthyology, 55, fig. 63, 1895, Gulf Stream. (Type, 

 No. 35420, Coll. Albatross; and No. 31861, Coll. Fish Hawk.) 



804. BATHYLAGTJS PACIFICUS, Gilbert. 



Head 4 ; depth 6| ; eye 2J. D. 8 or 9 ; A. 16 ; P. 9 ; scales 40. Anterior 

 profile not decurved; premaxillaries anteriorly on level of middle of eye; 

 snout short, less than half eye; interorbital space narrow, deeply grooved, 

 i orbit ; lower jaw with a series of small teeth ; the very weak premax- 

 illaries toothless ; a strong series of teeth on vomer and palatines. Front 

 of dorsal midway between adipose fin and front of snout ; ventrals under 

 posterior part of dorsal ; anal far back ; tail as long as head. Scales 

 lost, apparently about 40 in lateral line. Head, lining of mouth, gill 

 cavity, and peritoneum black ; fins blackish ; whole body probably black 

 in life. Coast of Washington; two specimens taken in 685 and 877 

 fathoms. 



Eathijlarjus pacificus, GILBERT, Proc. U. S. Nat. Mus., 1890, 55, Albatross Stations 3071 and 

 3074. (Coll. Gilbert.) 



Order T. INIOMI.* 

 (THE LANTERN FISHES,) 



Soft-rayed fishes, with the anterior vertebrae simple, unmodified, and 

 without auditory ossicles; symplectic present; no interclavicles; opercu- 

 lar apparatus sometimes incomplete ; pharyngeal bones unmodified ; gill 

 openings ample. Mesocoracoid arch wanting or atrophied. t Bones of 

 jaws variously developed, the maxillary sometimes connate with the pre- 

 maxillary. Shoulder girdle with its post-temporal not normally con- 

 nected with the skull, but touching it at or near the nape. Gills 4, a 

 slit behind the fourth. Air bladder, if present, with a duct. Dorsal and 

 anal fins without true spines ; ventral fins, if present, abdominal ; scales 

 mostly cycloid, often wanting ; adipose fin present or absent. Skeleton 

 mostly very weakly ossified. Photophores present in most cases. 



Marine fishes, mostly inhabiting the oceanic abysses, closely allied to 

 the Isospondyli, but lacking the mesocoracoid and having the connection 

 of the shoulder girdle with the cranium imperfect. In the character of 

 the mesocoracoid these fishes agree with the eels, and with the Haplomi 

 and the spiny-rayed fishes. These latter have the post-temporal differ- 

 ently attached. This order is a provisional one, and its members may be 



* We have had no opportunity for critical study of most of the families of the Iniomi. Our 

 knowledge of them is drawn chiefly from the recent monographic works, especially the excellent 

 report of Dr. Giinther on the Deep-Sea Fishes of the Challenger Expedition, that of Dr. Vaillant 

 on the fishes taken by the Travailleur et Talisman, and that of Dr. Liitken on the "Spolia 

 Atlantica" in the museum at Copenhagen. Even more important than these has been the 

 Oceanic Ichthyology of Goode & Bean, advance sheets of which comprehensive work have been 

 most kindly placed at our disposal. 



t This character, the most important by which the Iniomi are separated from Isospondyli, has 

 not been verified iu several of the families. 



