1044 Bulletin 47, United States National Museum, 



spot, in advance of which is a large black blotch ; a black humeral spot ; 



2 jet-black spots at base of caudal, more or less confluent into 1. In all 



other respects this agrees with the description of typical nianguce. 



Length 2f inches. Kentucky River; apparently rare. Close to Hadrop- 



terus nianguoBj but the scales much larger and the lateral line incomplete. 



((TTTiAorof, spotted.) 



Etheosloma nianguse spilotum, GILBERT, Proc. IT. S. Nat. Mas., 1887, 53, Sturgeon Creek, a trib- 

 utary of the Kentucky River, near Travellers Rest, Owsley County, Kentucky. 

 (Type, No. 38319. Coll. Gilbert); WOOLMAN, Bull. U. S. Fish Comm., x, 1890 (1892), 280, 

 pi. 51, fig. 3. 



468. COTTOGASTER, Putnam. 



Cottogaster, PUTNAM, Bull. Mus. Comp. Zool., 5, 1863, (tessellatum, THOMPSON, not of DE KAY 



= copelandi). 



Imosloma, JORDAN, Proc. Ac. Nat. Sci. Phila., 1877, 49, (shumardi). 

 Rheocrypta, JORDAN, Bull. U. S. Nat. Mus., x, 9, 1877, (copelandi). 



Body rather robust, little compressed. Head moderate, bluntish. 

 Mouth moderate or small, the lower jaw included ; premaxillaries pro- 

 tractile or occasionally (in shumardi) joined by a narrow frenum to the 

 frontal region ; maxillary not adherent to the preorbital. Teeth on 

 vomer. Gill membranes nearly separate. Scales ctenoid ; the middle 

 line of the belly anteriorly naked or with caducous scales ; lateral line 

 continuous. Dorsal fins large, the second usually smaller than the first 

 and smaller than the anal. Anal spines two, the first the longer. Pyloric 

 coeca 3 ; vertebrae 18 + 20 = 38 (copelandi). Skull short, the frontal region 

 not very narrow ; pa^ietals little convex transversely ; sutures distinct. 

 No supraoccipital crest. Coloration not brilliant. Size moderate, 

 (icorrof, sculpin; yaarrip, belly.) 

 COTTOGASTER : 

 a. Median line of belly with a series of more or less enlarged caducous spinous scales; cheeks 



and breast mostly naked. 



6. Dorsal rays X or XI-13; back with four broad black cross bands. URANIDEA, 1434. 



bb. Dorsal rays XI-10 or 11; back tessellated; sides pale, with a series of black blotches; 



a small ink-like speck at base of caudal. COPELANDI, 1435. 



IMOSTOMA (ei/uu, to move; <7To/u.a, mouth) : 



aa. Median line of belly naked anteriorly, with ordinary scales posteriorly; cheeks mostly 



scaly; premaxillaries sometimes with a frenum. 

 c. Dorsal rays X or XI-13 to 15; scales about 56; sides with diffuse dusky blotches. 



SHUMARDI, 1436. 



Subgenus COTTOGASTER. 

 1434. COTTOGASTER URANIDEA (Jordan & Gilbert). 



Head 3| to 3f ; depth 5f ; eye 3f in head ; snout 3f. D. X or XI-13 ; A. 

 II, 10 or 11; scales 6-48 to 56-x. Form moderately elongate, terete, very 

 little compressed ; upper profile gently arched, the lower almost straight ; 

 caudal peduncle short and very slender ; upper profile of head descend- 

 ing in a long gentle curve to the sharp snout. Premaxillaries always pro- 

 tractile, the fold very narrow. Eye equaling length of snout, 3| in head, 

 nearly twice interorbital width in a specimen 2 inches long. Opercular 

 spine well developed ; preopercular margin entire. Parietal region rather 



