2524 Bulletin 4.7, United States National Museum. 



972. BARATHRONUS, Goode & Bean. 



Barathronus, GOODE & BEAN, Bull. Mus. Comp. Zool., x, No. 5, 164, 1883 (bicolor). 



Brotulids having the head stout, body and tail compressed, covered 

 closely by skin; scaleless; vent far behind pectoral, included in a cleft; 

 inouth wide, oblique, the lower jaw projecting ; intermaxillary teeth rudi- 

 mentary ; several fang-like teeth on the head of the vomer, none on pala- 

 tines, a few rather large, recurved, separated teeth in the mandible; nos- 

 trils close together and small ; eye visible through the skin, partly upon 

 the top of the head, with or without dark pigment in the iris; barbel 

 none ; gill rakers very numerous and slender, and rather long ; gill lamina} 

 well developed on all the arches; no pscudobranchiai ; head full of mucif- 

 erous channels ; gill membranes not united, but covered by a fold of skin ; 

 ventrals reduced to single simple rays, placed in advance of the pectorals 

 and close to the humeral symphysis; dorsal and anal placed far back; 

 caudal scarcely differentiated, composed of rather numerous, very slender 

 rays upon a somewhat narrow base. (fidpaOpov, the abyss; oro$, Onus, 

 the rockling.) 



2895. BARATHROMJS BICOLOR, Goode & Bean. 



Head 5 in total, its width | its length ; depth 6 ; orbit 4f in head ; 

 iuterorbital width 4. D. about 70; A. 57. Body much compressed; eye 

 concealed by the skin ; maxillary extending slightly beyond the perpen- 

 dicular through posterior margin of orbit, almost entirely concealed under 

 the preorbital, and much expanded at tip, where its width is rather greater 

 than that of eye. Intermaxillary very thin, broad, and slightly protract- 

 ile; vomer very close to intermaxillary symphysis, its head somewhat 

 raised and bearing 3 fang-like teeth (2 of which are off one side and 1 on 

 the other in the type), separated by a moderately wide interspace; man- 

 dible with 5 enlarged, separate, recurved teeth upon each side, which 

 increase in size posteriorly, its upper edge, posteriorly, produced above 

 the level of the tooth-bearing surface, and received under the expanded 

 maxillary; longest gill raker about as long as eye. Dorsal origin dis- 

 tant from the snout about total length; dorsal rays well developed, 

 numerous, long, and slender, the longest about 3 times in length of head; 

 anal originating in vertical from fourteenth dorsal ray, equidistant from 

 eye and base of caudal, longest rays about as long as those in the 

 dorsal; pectoral with a fleshy base, its length a little less than height 

 of body. Ventral well in advance of pectoral, close to humeral symphy- 

 sis, the rays being placed very close together at their origin, the length of 

 the fin contained about 9 times in the total length, about 3 times in the 

 distance from its origin to the vent. Caudal with about 10 rays, its length 

 about 8 times in total length. Color yellowish white, with a broad ver- 

 tical band of black from origin of ventral nearly to vent; another similar 

 and narrower band above it upon each side. The type, 120 mm. long, 

 from BlaJce Station LXXI, off Guadaloupe, at a depth of 769 fathoms. 

 (Goode & Bean.) (bicolor, two-colored.) 



Barathronus bicolor, GOODE &. BEAN, Bull. Mus. Comp. Zool., x, No. 5, 164, 1883, off Guada- 

 loupe, in 769 fathoms (Coll. Blake) ; GOODE & BEAN, Oceanic Ichthyology, 341, fig. 

 298, 1896. 



