1662 Bulletin //, United States National Museum. 



the middle rays nearly as long as eye ; vent under fifth ray of second 

 dorsal; anal origin under sixth ray; anal rays increasing in size back- 

 ward, the longest not more than f as long as those of dorsal; rays of 

 soft dorsal and anal all simple and articulated; length of ventral spine 

 J of body, exceeding that of the longest soft ray; ventral, when fully 

 expanded, subtriangular, the spine minutely serrated on its anterior 

 margin; pectoral subcircular when expanded and composed entirely of 

 simple articulated rays, the longest, in middle of fin, | as long as eye. 

 About 10 rows of scales between the lateral line and base of spinous dor- 

 sal, and about 67 in lateral line. Plates at base of dorsal and anal well 

 developed. Length 3 to 3 inches. The type specimen was taken by the 

 Albatross at Station 2358 in 220 fathoms, off Yucatan; 2 other specimens, 

 No. 39297, from Albatross Station 2655, on Little Bahama Bank, in 338 

 fathoms. (Goode & Bean.) (6'Ao, whole: /tsrtig, scale.) 



Gyttus hololepis, GOODE & BEAN, Oceanic Ichthyology, 225, figs. 233, 233a, and 233b, 1896, 

 off Yucatan and Little Bahama Bank. (Type, No. 39296. Coll. Albatross.) 



653. OREOSOMA, Cuvier & Valenciennes. 



Oreosoma, CUVIER & VALENCIENNES, Hist. Nat. Poiss., iv, 515, 1830 (atlanticum) . 



Body elevated and compressed, scaleless, rough or warty, and provided 

 with several large, deciduous, conical, bony protuberances symmetrically 

 arranged, the surface " resembling a relief map of a volcanic country," 

 about 4 of these on the back and 20 below ; posterior part of bod^ with- 

 out cones; no bony plates at base of dorsal and anal. Head without 

 serrations ; a small horn above each eye ; opercle small ; preopercle with 

 2 ridges. Mouth oblique, the lower jaw projecting. Villiform teeth on 

 jaws, vonier, and palatines. Dorsal spines low and small, partially hidden 

 by the humps. Soft dorsal and anal similar, rounded in outline. Pec- 

 torals short, rounded. Caudal rounded, on a slender peduncle under 

 pectorals. Ventrals * well developed, thoracic. One species, scarcely 

 known, probably belonging to the Zeidce but its relationship uncertain. 

 It may very likely be a larva of the species called Cyttopsis roscus (Lowe), 

 or of some other species of Cyttopsis or of Cyttus. (opo, hill ; d&jua, body.) 



2078. OBEOSOMA ATLANTICUM, Cuvier & Valenciennes. 



Head nearly 3; depth about equal to length of body. B. 7; D. V, 29; 

 A. 26; V. I, 5; C. 14. Profile straight, nearly horizontal; mouth nearly 

 vertical ; forehead broad between eyes, above each of which is a small 

 conical horn ; suborbitals and preopercle entire ; opercle small ; tail and 

 region between dorsal and anal closely compressed and unarmed ; trunk 

 much thicker, with 2 great conical warts on each side above, and about a 

 dozen on each side below, 4 on the median line; these dermal cones are 

 readily detached, and are marked by concentric rings parallel with their 

 base. Spinous dorsal inconspicuous, hidden by the cones ; pectorals short ; 



* According to Cuvier & Valenciennes, the ventrals " ont le nombre ordinaire de I, 5." 

 But we may doubt if this number is accurately counted. 



