406 EXrLOEATIONS ACROSS THE GREAT BASIN OF UTAH. 



length, and anteriorly, from cheek to cheek, one-tenth being scarcely more than the 

 interorbital space. 



" The eyes are of moderate size, circular, and entirely lateral, but near the profile; 

 they are situated anterior to the plane separating the anterior and posterior halves of the 

 head, the suborbital ring being halt-way; the diameter of the eye exceeds a sixth of the 

 head's length (five twenty-eighths), and the center of the pupil is distant two diameters 

 from the muzzle. 



The dorsal fin commences midway between the muzzle and end of the median 

 caudal rays. Its base equals a ninth of the total length, its anterior rays fifteen 

 hundredths, and its last more than six hundredths. 



The anal fin commences between the sixth and seventh tenths of the length, is 

 smaller than the dorsal fin, and the disproportion between the anterior and posterior 

 rays is less. The base equals an eleventh of the length, the anterior rays thirteen 



The caudal fin is furcate, and its lobes equal; the median rays constitute a ninth 

 of the total length, and the longest equal a fifth. 



The pectoral fins are rounded, the third and fourth rays being longest; they equal 



first bra 



so rounded, and the third branched ray longest. They are 

 nched ray of the dorsal; their length equals thirteen hun- 



ml chan 



icter of the rays are indicated by the following formula: 



L 7 -4- A. 



4. 6-r-C. 9. I. 9. 8. T. 8; P. 1. 14; V. 1. 9. 



3 of mod 



•om the 

 are abo^ 



the dorsal and anal fins, except the fourth, are rudimentary, 

 crate size, and mostly suborbicular, with the nucleus sub- 

 radiating striae. The lateral line runs through about fifty 



dorsal to the base of the ventral fins there are seventeen 



dark pur 



same co 



pie or purphsh-hlue, with each scab- margined with darker, 

 lor as the body. 



species were obtained by Mr. C. S. McCarthy, 



rty, in the Salt Lake Basin of Utah. T 



species 



y the marginatum of the scales with a darker color. 

 Genus PLATYGOBIO, Gill. 

 Synonymy. 



(Vprinoid Fishes, (sop. copy, p. 24,) i„ Proceedings Academy of Natnral 

 ©deuces of [Miilud.'lphia, vol. viii, p. 1S7, lsr,G. ^-viurai 



The body is elongated, slender, and sub-fusiform, highest before the dorsal fin 

 ine caudal peduncle is oblong and rather stout. 



The scales are of large size, and nearly equal on the sides and front of the back- 



!&S£S? nearIy to the region aw the veiticai ° f the *—* -^ 



