107 (a). COTTID.E URANIDEA. 693 



** Skin naked, smooth. 



1052. I. * miciliatUS (Reinh.) 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; occiput with two blunt ridges, in front of which the 

 vertex is concave; upper preopercular 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. VIII-13; A. 11. L. 4 inches. 

 Cape Cod to Greenland, in deep water; abundant. 



(Coitus uncinatus Reinh. Vid. Sel.sk. Natur. og Math. Afhaudl. 1833, 44: Centriderm- 

 ichthys uncinatus Giinther, ii, 172: Icelus uncinatus Kroyer, Naturh. Tidsskr. 1844, '253.) 



1053. I. (?) bicornis (Reinh.) J. & G. 



Occiput with two acute points ; four preopercular spines, the upper- 

 most of which is bifurcate. Skin not described. D. VIII-15; A. 14. 

 Greenland. ( Giinther. ) 



(Coitus bicornis Reinh. Vidensk. Selsk. Natur. og Math. Af h, viii, Ixxxv : Centriderm- 

 ichthys bicornis Giinther, ii, 172.) 



366. URANIDEA Dekay. 

 Miller's Thumbs. 



(Coitus and Cottopsis Girard.) 



(Dekay, New York Fanna, Fish., 1842, 61: type Uranidea quiescens Dekay = Coitus 

 gracilis Heckel.) 



Fresh-water 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 6. Dorsals 

 nearly or quite separate, the first of 6-9 slender spines; ventrals 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- 



*This species should form the type of a distinct genus if the current genera of this 

 group are to be recognized. The Japanese genus Centridermichthys Rich, to which 

 this species and many others of our Cottoids have been referred, differs from I. unci- 

 natus in having the slit behind the last gill developed, and the gill-membranes fully 

 united to the isthmus. 



