693 
107(a). COTTID.E — URANIDEA. 
** Skin naked, smootk. 
1059. I. *iiiicinatus (Eeinb.) Kroyer. 
Olivaceous, mottled and barred with darker, above and on fins. Head 
broad; lower jaw included; palatine teeth well developed; maxillary 
extending to opposite middle of pupil. Eyes very large, separated by 
a narrow ridge; ocH?iput with two blunt ridges, in front of which the 
vertex is concave; upper jireopercular spine large, strongly hooked 
upward, more than half length of eye; downward-directed spine on pre- 
opercle long and sharp ; skin perfectly smooth. Pectorals reaching front 
of anal; spinous dorsal rather high; vent midway between snout and 
middle of caudal. Head 3; depth 4^. D. VIIl-13; A. 11. L. 4 inches. 
Cape Cod to Greenland, in deep water; abundant. 
{Coitus uncinatus Reinh. Vid. Selsk. Natur. og Math. Afbaiidl. 1833, 44: Centriderm- 
ichihys uncinatus Giintber, ii, 172: Icelus uncinatus Kroyer, Katurb. Tidsskr. 1844, 253.). 
1053. I. (?) bicornis (Reiub.) J. & G. 
Occiput with two acute points ; four preopercular spines, the ujiiier- 
most of which is bifurcate. Skin not described. D. VIII-15; A. 14. 
Greenland. ( G ilnther . ) 
{Cottus hicornis Reinb. Vidensk. Selsk. Natur. og Matb. Afb, viii, ixxxv: Centriderm- 
ichthys bicornis Giintber, ii, 172!) 
366.— URAIVIDEA Dekay. 
Miller^s Thumbs. 
{Cottus and Cottopsis Girard.) 
(Dekay, New York Fauna, Fisb., 1842, 61: type Uranidea quiescens Dekay = Cottas 
gracilis Heckel.) 
Fresh-tcater sculpins. Body fusiform. Head feebly armed, the pre- 
opercular spines covered by the skin; skin smooth or very nearly 
so; villiform teeth on jaws and vomer, none on palatines. Gill- 
openings separated by a wide isthmus, over which the membranes do 
not form a fold; no slit behind fourth gill. Branchiostegals G. Dorsals 
nearly or quite separate, the first of C-9 slender spines; ventral s I, 3, 
or I, 4. Fishes of small size, inhabiting clear waters in the northern 
parts of Europe, Asia, and America. The species are extremely nu- 
*Tbis species sbould form tbetype of a distiuct geuus if tbe curreut geuera of tbis 
group are to be recoguized. Tbe Japauese geuus Centridermichtliys Ricb. to which 
tbis species aud mauy others of our Cottoids have l)eeu referred, diifers from /. unci- 
natus iu baviug tbe slit bebiud tbe last gill developed, aud tbe gill-membraues fully 
united to tbe isthmus. 
