TROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 459 



oiv the: oeneric rx:l.atioiv8 of belong exii^is girard. 

 By DAVBD S. JORDAN and C£IAKILES H. OILBEKT. 



The '' neeclle-fisli" [Belone exilis Girard), of the Califoruia coast, differs 

 from the type of the genus Belone in the development of the gill-rakers. 

 In Belone vulgaris the gill-rakers are well develo])e(l, loug, and .slender, 

 and a patch of teeth is x^resent on the vomer. In Belone exilis the gill- 

 rakers are entirely wanting, and there are no vomerine teeth. The 

 gill-rakers are also wanting in the Atlantic species, Belone lomjirostris 

 (Mitch.), Belone latimana Poey, Belone melanocMra Poey, Belone notata 

 Poej", and Belone Mans (Cuv. & Val.), and probably also in Belone can- 

 traini, which is the type of the gouus Tylosurus Cocco. Tbe generic 

 name Tylosurus may therefore be provisionally adopted for the species of 

 Belone without gill-rakers. The caudal keel on which the genus Tylo- 

 surus was based, and which is develoj)ed in T. exilis as in T. cantraini, 

 has apiiarently no systematic importance. 



Bloomington, Ind., December 2, 1880. 



NOTES ON A COIil^ECTION OF FISHES FROm UTAH I.AKE. 



By DAVIO S. JORDAN and CHARI.ES H. OII.BEKT. 



A short visit to Provo, Utah, on Utah Lake, enable<l one of the writers 

 to make a small collection of the fishes of that locality. This collection 

 has been since supplemented by an excellent series of the difi'erent si)e- 

 cies, presented to the United States National Museum by Peter Mad sen 

 and sons, fishermen at Provo. Four of the thirteen species obtained 

 seem to be new to science. 



1. Cottopsis semiscaber Cope. — Bull-head. 



Two specimens. Professor Cope says of his types : " Skin prickly above 

 the lateral line, smooth below it i^osteriorly." Our specimens are villous 

 above and below, as in Cottopsis asper, from which C. semiscaber differs 

 chiefly in the less number of rays in the vertical fms. 



The genus Cottopsis is distinguished from Centriclcrmiehthys mainly by 

 the absence of a slit behind the fourth gill, which, as I am informed by 

 Dr. Gilnther, is present in Centridermichthysfasciatus. Centridermichthys 

 uncinatus, of the North Atlantic, agrees with Cottopsis in this respect, 

 and should probably be referred to it. The American genera of Cot- 



