Jordan and Evermann. Fishes of North America. 271)3 



nearer snout than base of caudal; the dorsal fin short, its base not exceed- 

 ing the height of the longest ray, usually less. In our specimens the pec- 

 torals reach scarcely distance to ventrals and the ventrals scarcely 

 f distance to vent; the anal may extend beyond base of rudimentary 

 caudal rays. Scales strongly ridged, their margins creuate; the anterior 

 scales are smaller, but do not appear greatly crowded; the average 

 number of tubes in the lateral line is about 73, the number varying from 

 69 to 77. Dusky, the lower part of sides with coarse black specks, the 

 under parts white; fins all dusky. (Gilbert.) 



A larger specimen has been described as follows : Head 4 -5 ; depth 4 ; 

 eye 6 in head; snout 2; maxillary 3; mandible 2;^; interorbital 2; 

 width of mouth 3i in head, more than % length of snout; greatest width 

 of lower lip diameter of eye. D. II, 11 ; A. 7 ; scales 13-70-11. Body 

 rather slender ; head long, mouth moderate, horizontal; lips thick papil- 

 lose, the upper with about 4 or 5 rows of papilla', lower with about 7; 

 lower lip divided nearly to base, leaving only 1 row of papilla) crossing 

 the symphysis; premaxillary not much projecting and not forming a 

 prominent hump ; maxillary rather short, not reaching vertical at front of 

 anterior nostril; eye equally distant between snout and posterior edge of 

 operclo; mucous canals on head forming raised ridges, the pores conspicu- 

 ous. Fins moderate ; origin of dorsal a little nearer snout than base of 

 caudal, sixth spine over insertion of ventrals ; pectoral 1 in head, reach- 

 ing slightly more than f- distance to ventrals; ventrals not quite reaching 

 vent, the seventh ray longest, If in head; anal long, pointed, reaching to 

 base of caudal, 1J- in head. Scales crowded anteriorly, about 32 trans- 

 verse rows in front of dorsal, strongly ridged, the margins crenate. 

 (Evermann & Meek.) Length 1 to 2 feet. Klamath Lakes, Oregon; 

 specimens examined from Upper Klamath Lake, Lost River, and William- 

 son River. (Named for Mr. John O. Snyder, instructor in Zoology in 

 Stanford University.) 



Gatostomus snyderi, GILBERT, Bull. U. S. Fish Comm, 1897 (Jan. 6, 1898) 3, Upper Klamath 

 Lake, Oregon (Type, No. 48222. Coll. Gilbert, Cramer & Otaki); EVERMANN &MEKK, 

 Bull. TJ. S. Fish Coinm. 1887, 69. 



Page 178. After Catostomus occidentalis add: 



286(a). CASTOSTOMUS TSILTC'OOSEIVSIS, Evermann & Meek. 



Head 4; depth 5; eye 6 in head; snout 2. D. 13; A. 7; scales 13-65-8, 

 34 before the dorsal. Pectoral 1^- in head; longest dorsal ray 1?; base of 

 dorsal l? r ; longest anal ray 1 ; ventral If. Body rather slender, subterete ; 

 head small, snout long and pointed; mouth inferior, overhung by the pro- 

 jecting snout; lips rather thin, 1 row of large papilla) -on upper lip, and 

 about 2 irregular rows of smaller ones behind or inside of it; lower lip 

 incised nearly to base, 1 or 2 rows of small papilla) across the isthmus; 

 lobes of lower lip moderately long and thin, the bases with papilla) merging 

 into plications toward the tips. Eye quite small, the anterior edge of 

 orbit at middle of head. Top of head flat or very slightly convex between 

 the eyes. Fins small ; pectorals short and rounded ; ventrals short, rounded, 

 3030 98 



