346 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.xxiv. 
jaw prominent; teeth rather small, simple, hooked, sharp, in 2 rows 
anteriorl}^; pseudobranchije large; gills 3^; 8ul)orbital connected by a 
bony stay with the preopercle; gill opening small, above the base of 
the pectoral, which is broad and procurrent; ventral disk moderate, 
fringed. Dorsal short and high, of soft rays only, opposite the short 
anal, both well separated from the small caudal. {C ydoptenii<\ ix^v^^ 
fish.) 
2. CYCLOPTERICHTHYS VENTRICOSUS Pallas. 
Oyclopterus ventricosus Pallas, Spicilegia ZooL, VII, 1769, p. 15, pi. ii; Kam- 
chatka. 
Cotylis ventricosHs Gdnther, Cat., Ill, 1861, p. 498 (copied). 
Cydopterichthyii ventricosus Jordan and Gilbert, Synopsis 1883, p. 745 (after 
Steindachner). — Garman, Discoboli, 1892, p. 41. — Jordan and Evermann, 
Fishes of North and Middle America, II, 1898, p. 2104; St. Paul Island, 
Pribilof, Petropaulski. — Jordan and Gilbert, Fishes of Bering Sea, III, p. 
475; Petropaulski, St. Paul, Bering Island, Atka. 
Cydopterichth/s ylaber Steindachner, Ichth. Beitr., X, 1881, p. 14, pi. viii; 
Ochotsk Sea. 
Head 3 in length; depth 3i; depth of caudal peduncle 3f in head; 
length of snout 3; maxillary 2i; eye 6; interorbital space If; D. 9; 
A. 7; P. 20. 
Body stout, thick, abruptly- compressed behind ; the head broad, 
depressed, slightly convex on the crown; the snout blunt, broadly 
rounded w^hen seen from above. Mouth wide, the angle on a line 
passing about midway between tip of snout and eye, the lower jaw 
projecting bej^ond the upper; teeth small, simple, pointed, close set; 
in 2 prominent series, the outer ones minute, especially on posterior 
part of lower jaw; 3 or 4 large teeth form a third rather indefinite 
inner series on front of jaws. Eye lateral, much nearer to tip of snout 
than to gill opening. Gill slit about .5 in head, with a rounded fiap. 
Spinous dorsal wanting, the soft dorsal short, inserted on the tail. 
Anal similar to the dorsal in shape, inserted a little behind it. Pec- 
toral If in head; the lower part of its base extends far forward below. 
Ventral disk nearly round, wnth a broad, free margin, its longitudinal 
diameter contained about 1^ times in head, its center on a perpendic- 
ular passing aljout midway ijetween e3'e and gill opening. 
Color dark olive, with numerous small, round, black dots on the 
upper parts. Posteriorly the dots coalesce forming indistinct, irreg- 
ular, narrow bands or reticulations. 
Described from an example from Aomori, 170 millimeters long 
exclusive of the caudal fin which is broken. The specimen was pre- 
sented by Mr. Sotaro Saito. Of 2 specimens from the Pribilof Islands, 
1 has ver}' small spots scarce!}" distinguishable from the general dark 
color; the other is similar in color to the Japanese example. 
Bering Sea and southward to northern Japan. 
