CATOSTOMUS TAHOENSIS. 



173 



30. CATOSTOMUS LABIATUS Ayres. 



Thick-lipped Sucker. 



1855 — Catostomus laiialus Ayres, Proc. Cal. Ac. Nat. Sc. i, 32. 



Catosiomus lahiaiiis Giraud, Proc. Ac. Nat. Sc. Philp... 175, 1856. 

 Catostomus Idbiatus Girard, U. S. Pac. ]§• K- Expl. x, 224, 1858. 

 Catosiomus Jahiatus Jordan & Copeland, Check List, 156, 1876. 



Habitat. — Streams of Oregon (Klamath Lake). 



I have seeu only the specimen from which Girard's description was 

 taken. Like macrochilus, this species appears distinct from occidentalism 

 but the examination of a laiger series of specimens is necessary to 

 prove it. At present, it appears to difler from macrochilus and occiden- 

 talis in the smaller size of the dorsal fin. 



Specimens in United States National Museum. 



Number. 



Locality. 



Collector. 



239 Klamath Lake, Oregon . 



Dr. John S. Newberry. 



31. CATOSTOMUS AE^OPUS Jordan, sp. nov. 



Hard-headed Sucker. 

 1878 — Catostomus arceopus Jordan, MSS., Wheeler's Eej ort Surv. W. 100th Mer. (ined.). 

 This species represents G. discobolus in the section Dccadactylus. Its 

 very narrow fontanelle and sheathed lips indicate its close relation to 

 Pantostcus. The specific name is from apacdg, small, thin ; o-ij, hole or 

 aperture. The typical specimens were from Kern River, California. 



Specimens in United States National Museum. 



32. CATOSTOMUS TAHOENSIS Gill & Jordan. 



Sucker of Lake Tahoe. 



1868 — Acomus generosus Cooper, Cronise's Nat. Wealth Cal. 495. (No* of Girard.) 

 1878 — Catostomus tahoensis Gill & Jordan, Bull. U. S. Nat. Mus. xi, p. — . 

 Habitat.— Lake Tahoe, Nevada. 



The Sncker of Lake Tahoe is closely related to Catostomus longirostris, 

 but seems to differ constantly in the shorter head and more contracted 



