8 



Recapitulation : 



The fishes of the Utah Lake above enumerated, number twelve species, 

 as follows : 



SalmonidcB. 



Salmo virginalis, Girard. 

 CoregonidcB. 



Rhinichthys henshavii, Cope. 

 Coregonus villiamsonn, Girard. 



Catostomidce. 



Minomus platyrhynchus, Cope. 

 Minomus jarrovii, Cope. 

 Catostomus ? generosus, Girard. 



Siboma atraria, Girard. 



Alburnellus, sp. 



Alburnellus rhinichthyoides, Cope. 



Clinostomus hydrophlox, Cope. 

 Clinostomus tsenia, Cope. 

 Hybopsis timpauogensis, Cope. 



The following species were obtained at other localities in Utah and 

 Arizona. 



CERATICHTHYS BIGUTTATUS, Kirtland. 



Baird, Girard, Cope Cyprinidae of Pennsylvania, p. 366, Tab. xi., fig.. 



5, var. cyclotis, Cope, Proceed. Acad. Nat. Sciences, 1864, p. 278. 



Dr. Yarrow obtained a number of specimens of this abundant eastern 

 fish at Harmony, in Southern Utah. This is an unexpected discovery, 

 giving the species the greatest known range of any of our Cyprinidae, 

 the Semotilus corporalis accompanying it to the eastern slope of the 

 Rocky Mountains. The Smoky Hill River was the most western locality 

 for the C. Mguttatus up to the present time. 



CERATICHTHYS VENTRICOSUS, sp. nov. 



Allied to C. henshavii, Cope, but distinguished by its deeper body and 

 more numerous scales below the lateral line, which exceed in number 

 those above it, contrary to the rule usual in Cyprinidce. Depth at ven- 

 tral fin one-fourth length exclusive of caudal fin, and a little less than 

 length of head, orbit a little less than one-fourth length of head and 1.33 

 times in length of muzzle and interorbital width. Muzzle compressed, 

 projecting beyond the horizontal mouth ; maxillary bone reaching the 

 line of the anterior nostril. Radii D. I. 7 ; A. I. 7 ; V. 7. Dorsal origi- 

 nating behind line of ventrals. Scales it. The specimens are bleached 

 by the action of spirits, but they appear to have been of uniform color, 

 excepting an irregular dark band from the end of the muzzle to the caud- 

 al fin. Length of a specimen to base of caudal M. .061 ; do. to base 

 of anal .043 ; do. to base ventral .033 ; do. to base dorsal .035 ; length 

 head .0162 ; width do. between orbits .0045 ; do. at middle of ptero- 

 tics . 0073. Number cccl ; from Arizona. 



MYLOLETJCUS PAROVANUS, sp. nov. 



With a general similarity to Clinostomus montanus, this fish may be 

 readily determined by the generic characters of the teeth and fins, as 



