2046 Bulletin ^7, United States National I\hisenm. 



described from specimeus from Bristol Bay. {doodsxdsdpoi, having 12 

 surfaces or sides.) 



Ou these specimens Dr. Gilhert has the followiuc; notes: 

 " A few specimens taken in Bristol Bay in 41 to 14 fathoms. In males the 

 colors are much brighter tiaan in females, recalling 0. rernicosa. The 

 bars on dorsal lins 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 iuterradial membrane of ventral jet- 

 black; in none of our specimens docs the caudal tin 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." (SchdeHa, twelve; sdpa, surface, side.) 



Agonus dodecal'dron, Tilesids, Mem. Acail. Petersb., iv, pi. 13, 1810, Kamchatka (Coll.W. T. 



Tile.sius) ; GiJNTHEK, Cat., u, 214, 1860. 

 PhalangiMes loricatnn, Pallas. Zoog. Rosso- Asiat., ui, 114, taf. 19, 1811. Kamchatka. 

 Aspidophorus dodeca'edrus, Cuvier <.t Valenciennes, Hi.st. Nat. Poiss., iv, 209, 1829. 

 Brachyopsis dodeca'edrus, Jordan & Gilbert, Synopsis, 723, 1883. 



764. BRACHYOPSIS, Gill. 



Brachyopsis, Gill, Proc. Ac. Nat. Sci. Phila., xiii, 1861, 167, 259 (rostratus). 

 Siphayonus, 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, dej)ressed, about 41 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 oral)8ent; supraocular 

 and occipital spines none; gill meml)ranes united, free from isthmus; anal 

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

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

 least some of the plates on body spinous; plates on breast usually with 

 interspersed small prickles or tubercles, {ftpaxvi, short; utl)iz, face.) 



a. Aual rays 13; dorsal spines 8; body fusiform, broad at tbc breast, tbe tail very 

 .slender. rostratus, 2404. 



aa. Anal rays 12; body slender; eye behind middle <if Iiead; 2 spines on suborbital. 



segaliensis, 2405. 



2401. IJRilCHYOPSIS ROSTRATUS * (Tilesius). 



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

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



* Diagnosis. Lateral line 36. Body more fusiform tbnn in other speeies of tins genua, 

 very robust in front ot the middle.' linnrinL: to tlir slcmlci- l:n'l. Heail triangular and 

 pointed, as seen from above, the iixiutli i|niti- ii;nid\\ ; cw's siikiU, well forward; head 

 considerably depressed, snout witliouf s)iine; a shoil Hap at aiiylo of oioiitli: scales not 

 Tery routcli: uill ineiiibnines free from istlimus: vciitials (|uilc sliort ; breast with a 

 median row of raised convex plates; arow of siniibir ])lales hoi-dt-ring edge of gill open- 

 ing, the tliree series tormiug aA-shaped ti?:ure, tlie iiileistires lilled witli very small 

 plates. This diagnosis from Bering Sea specimens obtained by Dr. I'.ean. (Jordan & 

 Gilbert.) 



