2046 Bulletin tf, United States National Museum. 



described from specimens from Bristol Bay. (SooSexdedpot, having 12 

 surfaces or sides.) 



On these specimens Dr. Gilbert has the following notes : 

 " A few specimens taken in Bristol Bay in 4 to 14 fathoms. In males the 

 colors are much brighter than in females, recalling 0. vernicosa. The 

 bars on dorsal fins are, in males, intense black and bright white, instead 

 of olive brown and whitish as in females; males show also a larger black 

 patch on last anal rays, and have the interradial membrane of ventral jet- 

 black- in none of our specimens does the caudal fin show transverse lines 

 of brown points, as described by Cuvier; in both males and females the 

 caudal is dusky or black, the median rays lighter, the outer ones white. 

 D. IX or X, 7 or 8; A. 14 to 16." (dwdena, twelve; $8 pa, surface, side.) 



Agonus dodecaedron, TiLESius r Mem. Acad. Peters!)., rv, pi. 13, 1810, Kamchatka (Coll.W. T. 



Tilesius) ; GUNTHER, Cat., n, 214, 1860. 



Phalangistes loricatus, PALLAS, Zoog. Rosso-Asiat., m, 114, taf. 19, 1811, Kamchatka. 

 Aspidophorus dpdecaedrus,VvviER &. VALENCIENNES, Hist. Nat. Poiss., iv, 209, 1829. 

 Brachyopsis dodecaedrus, JORDAN & GILBERT, Synopsis, 723, 1883. 



764. BRACHYOPSIS, Gill. 



Brachyopsis, GILL, Proc. Ac. Nat. Sci. Phila., xm, 1861, 167, 259 (rostratus). 

 Siphagonus, STEINDACHNER, Ichth. Beitrage, v, 140, Sitzb. Acad. Wiss. "Wien, LXXIV, July, 

 1876 (segaliensis) . 



Body moderately elongate, tapering nearly uniformly from head to cau- 

 dal; depressed, 8-hedral (6-hedral on peduncle); depth about 8, width 

 about 6 in length ; head broad, depressed, about 4| to 5 in standard length. 

 Snout long, almost tubular, bearing the short jaws at the end. Plates in 

 dorsal series about 35 to 40 or more ; a barbel at tip of each maxillary ; 

 median rostral plate none; nasal spines minute or absent; snpraocular 

 and occipital spines none ; gill membranes united, free from isthmus ; anal 

 nn long, with 12 or 13 rays, first dorsal usually long; mouth oblique, 

 lower jaw projecting; teeth present on jaws, vomer, and palatines; at 

 least some of the plates on body spin OILS; plates on breast usually with 

 interspersed small prickles or tubercles, (fipaxvt, short; o^>z, face.) 



a. Anal rays 13; dorsal spines 8; body fusiform, broad at the breast, the tail very 

 slender. ROSTRATUS, 2404. 



aa. Anal rays 12; body slender; eye behind middle of head; 2 spines on suborbital. 



SEGALIENSIS, 2405. 



2404. BR1CHYOPSIS ROSTRATUS* (Tilesius). 



Br.6; D VIII, 8; A. 13; C.10; P. 14; V, I, 2. Body more elongate than 

 in Agonus catapliractm, the tail very slender, the body distinctly fusiform, 



, ; eyes , ; 



msKlerably depressed, snout without spine; a short flap at angle of mouth; scales not 



