FISHES, LAHONTAN SYSTEM OP NEVADA AND NORTHEASTERN CALIFORNIA. 65 



rather evenly convex. Head pointed; mouth oblique, but not enough so to interfere with the curved 

 ventral contoiu- of head; lower jaw slightly projecting; premaxillary protractile. Eye large, its diam- 

 eter less than length of snout and greater than half the width of interorbital space. Posterior nostril 

 elongate, the anterior semicircular. Teeth (paratype) in a single row, 5 on each side, slightly hooked 

 at tip; a narrow grinding surface present. They are higher, lighter, and the arch is more slender than 

 in 5. obesus. Gillrakers long and slender, so closely apposed that the space between two of them is 

 narrower than the base of either. Pseudobranchise restricted to a small area. Scales large , very regular, 

 somewhat crowded on the throat. Lateral line decurved anteriorly and then extending straight along 

 side of body and middle of tail. Origin of dorsal midway between tip of snout and last scale on base of 

 caudal. Edge of anal straight. Ventrals inserted directly beneath origin of dorsal; their edges rounded. 

 Upper edges of pectoral longest. Caudal deeply forked. 



The preserved specimen is dusky above, light yellowish beneath; the scales on sides broadly edged 

 with dusky color; caudal with a distinct dusky edge. In life, olive above, lighter on the sides, white 



Fio. 6.—Leucidius peciinifer. Type. Lake minnow. 



below; scales with a bright silvery sheen. Dorsal olive; caudal olive, but lighter than the dorsal; 

 other fins strongly tinted with red. 



There are from 29 to 36 gillrakers in this species; usually 31 to 33: 



The teeth are invariably 5-5. The scales in the lateral series number from 53 to 63; between lateral 

 line and back 13 to 15; between occiput and dorsal fin 29 to 35; between ventrals and lateral line 7 or 8. 



Other measurements follow: 



