1950 Bulletin //, United States National Museum, 



body, except lower part of caudal peduncle, thickly covered with slender 

 papilliB ; those of anterior and upper parts of body each tipped with a 

 spine, many of those on head with median pores; top of head with a me- 

 dian lengthwise depression. Head narrowed anteriorly, the maxillary 

 extending to beyond pupil ; opercular and preopercular spines as in Coitus 

 a8j}er; lateral line not complete; spinous dorsal low ; soft dorsal and anal 

 high; caudal long; pectorals about reaching anal; ventrals rather broad, 

 reaching about halfway to anal. Olivaceous, barred and spotted as in 

 other si^ecies; fins mottled; spinous dorsal pale at base and tip, with a 

 median broad black band ; 2 dark blotches at base of caudal. Length 

 4 inches. The specimens here described from Provo River at Provo, where 

 it is associated with the smooth form called wlicelcri, which differs only 

 in its smooth skin. In specimens from the Yellowstone Park the band 

 of palatine teeth is very broad; there are no prickles on the skin. 

 The head is 3i in length and the rays are D. VII, 17 ; A. 13 ; V. I, 4. Com- 

 paring these (Gibbon River, Wyoming) with specimens of Coitus ietalops, 

 from Mammoth Spring, Arkansas, the differences seem well marked. Coi- 

 tus semiscahcr has the head blunter, lower, and more rounded, the cheeks 

 more tumid and the top of the head without median longitudinal depression. 

 Coitus ictalojjs hiis the axil iirickly, the outline of the head angular, the 

 top of the head with a median longitudinal depression from snout to nape, 

 and the body has broad distinct black cross bars. These 2 forms seem 

 like distinct species, but other specimens are intermediate ; specimens from 

 Torch Lake, Michigan, agree with semiscahcr in color, and are intermediate 

 in form ; specimens from White River, Indiana, are colored like ietalops, but 

 are intermediate in form. Apparently semiscalxr should be recognized as 

 a species, but its range and distinctive characters are yet to be made out 

 in detail, {semiscahcr, half rough.) 



Cottopsis semiscahcr,* CoPE, Hayden Survey of Montana, 476, 1871 (1872), Fort Hall, Idaho; 



Jordan & Gu^beet, Proc. U. S. Nat. Mus. 1880, 459; Jordan, Bull. U. S. Fish Comm. 



1889, 53. 

 Utanidea semiscabra, Jordan & Gilbert, Synopsis, 695, 1883. 

 Uranidea vheeleri, Cope, Proc. Arner. Phil. Soc. Phila. 1874, 138, Bear River, Utah. (Coll. 



Lieut. G. M. Wheeler.) 

 Uranidea vheeleri, Cope & Yarrow, Zool. Wheeler's Expl. W. 100th mer., v, 696, pi. 32, figs, 



3, 3a, 3h, 1876 ; Jordan & G Hubert, Synopses, 697. 

 Gottus bairdi punctulatus, Jordan, Bull. U. S. Fish Comm. 1889, 29, 36, 53 ; with plate. 



2321. COTTUS ICTALOPS (Eafinesquo). 



(Miller's Thumb; Blob; Muffle-.jaw; Bullhead; Springfish.) 



Head 3^; depth 4 to 6. D. VI to VIII, 16 or 17; A. about 12; V. I, 4. 

 Body slender or stout, tapering regularly backward to the tail; vertex 



* Cottopsis semiscaber is thus descrihed hy Professor Cope : 



" Kiulli. D. A'll, 18; A. 13; V. I, 4; first ray of anal below third of second dorsal. Skin 

 prickly above the lateral line, smooth below it posteriorly. Body compressed, profile 

 risinii' rather steeply to the basis of first dorsal fin. Eye 4.5 times in head, .75 time in 

 interorbital space. Muzzle contracted, maxillary bone reaching to below middle of pupil. 

 Two spines on preoperculnm : 1 on inferior angle of operculum. Lateral line discontinued 

 on last fourth of caudal peduncle. Head ^ length, witliout caiidal fin. Below yellow; 

 dorsal line with ii series of dark spots; sides with large dark clouds. Three epecimena 

 from Fort Hall, Idaho." (Cope.) 



