107 (). COTTID^ URANIDEA. 695 



and Cascade Mountains; abundant; specimens from the Sacramento 

 Eiver (var. parvus) smaller in size, paler in color and with the interor- 

 bital space concave, narrower than eye. 



(Coitus asper Rich. Fauna Bor.-Amer. Fish. 295, 1836: Trachidermus richardsoui ; 

 Hcckcl, Ann. Wiener Mas. 1840, 162: Centridermichtitys aspcr Giinther, ii, 170: Col- 

 topsis asper Grtl. U. S. Pac. R. R. Surv. Fish. 51: Cottopsis parvus Girard, Proc. Acad. 

 Nat. Sci. Phila. 1854, 144: Centridcrmichthijs parvus Giinther, ii, 170.) 



1O56. U. semiscabra (Cope) J. & G. 



Olivaceous, barred and spotted as in other species; fins mottled; 

 spinous dorsal pale at base and tip, with a median broad black band; 

 two dark blotches at base of caudal. ^Form of U. aspera, but slenderer. 

 Skin* of top of head and entire body, except lower part of caudal pe- 

 duncle, thickly covered with papillae; 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 median lengthwise depression. Head nar- 

 rowed anteriorly, the maxillary extending to beyond pupil; opercular 

 and preopercular spines as in U. aspera ; lateral line not complete; 

 spinous dorsal low; soft dorsal and anal high; caudal long; pectorals 

 about reaching anal; ventrals rather broad, reaching half way to anal. 

 Eye 4 in head. Head 3J; depth 4J. D. VII-18; A. 14; V. I, 4. L. 4 

 inches. Fort Hall, Idaho (Cope). Utah Lake (Jordan). 



(Cottopsis semiscaber Cope, Hayden's Survey, Montana, for 1871-72, 476: Cottopsis 

 semiscaler Jordan & Gilbert, Proc. U. S. Nat. Mas. 1880, 459.) 



cc. Skin smooth, or prickly in or behind the axil only. (Potamocottvs\ Gill.) 



1O5T. U. gtilosa (Grd. ) J. & G. 



Olivaceous, variously mottled and barred; fins clouded with darker. 

 Form rather robust. Mouth moderate, the maxillary reaching to pupil ; 

 palatine teeth evident. Eyes small, little wider than the interorbital 

 space; preopercular spine short; spiuous dorsal low; pectoral fins 

 about reaching anal; veutrals I, 4, not to vent. Head 3; depth 5. D. 

 1X-21; A. 15-17 (Washington); D. VIII-20; A. 18 (California). L. 6 

 inches. Eivers from California to British Columbia; not rare. Cali- 

 fornia examples have the axillary prickles developed as usual in U. rich- 

 ardsoni; all of them within the space covered by pectorals when de- 

 pressed. Specimens from Vancouver's Island and about Port Town- 

 send have these prickles forming a considerable band, and extending 



* "Skin prickly above the lateral line; smooth below it posteriorly." (Cope.) 

 iGill, Proc. Boat. Soc. Nat. Hist, viii, 40, 1861: type Coitus punctulatus Gill. 

 ?, river; xorrot, sculpin.) 



