Short-nosed Sucker 



contributing, with Catostomus ardens, to make that lake the "greatest 

 sucker pond in the world." 



Head sf ; depth 5; eye 6 to 7; scales 9-63-8; D. n ; A. 7; inter- 

 orbital space broad, 2\ in head; width of the open mouth ^\ in head; 

 dorsal elevated in front, its longest ray twice the length of the last and 

 about equal to base of fin; caudal deeply forked, the lower lobe the 

 longer; lower fins small. Colour, dusky above, pale below; back 

 and sides profusely covered with dark punctulations. Length 18 

 inches or less. 



Short-nosed Sucker 



Chasmistcs btevirostris Cope 



This species is known only from the Klamath Lakes of Oregon. 

 It attains a length of 12 to 18 inches and is a food-fish of some value 

 to the Indians, who know it as the " Yen." 



Snout z\ to 2f in head; mandible i^ in snout; interorbital width 

 2\ in head; D. n; A. 9; scales 13-73-12; premaxillary spines not 

 produced to form a hump on the snout; lower lip fold present on the 

 sides of the mandible; each lip with small, inconspicuous, sparse 

 tubercles, in 3 or 4 series on the upper lip; ventrals extending f 

 distance to vent; scales with strong concentric striae. Colour, dark 

 above, silvery on lower part of side and on belly; fins all dusky. 



Klamath Lake Sucker 



Chasmistes stomias Gilbert 



This is another species ot Chasmistes inhabiting Upper Klamath 



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