150 PROCEEDINGS OF THB ACADEMY OF [1883. 



thin dermal fold, extending entirely around the chin. Both upper 

 and lower lips 'delicately tubercular. Eye oval, the axis longi- 

 tudinal, and contained seven times in the length of the head, of 

 which three and a-half times are contained in the muzzle. Inter- 

 orbital region flat, one-third as wide as the head is long. Scales 

 12-80-9 ; radii D. 11, A. 9. Color clouded above with black punc- 

 tulations ; below paler, with red shades in some specimens ; fins 

 uncolored. It attains a length of nearly three feet. It ascends 

 the streams tributary to Lake Klamath in thousands in the spring, 

 and is taken and dried in great numbers by the Klamath and 

 Modoc Indians. The former call it "Tswam." 



The character of the lips, the oval e^'e, and the less interorbital 

 width distinguish this species from the C. brevirostris, as well as 

 the longer muzzle and superior size adduced in my original 

 description. 



On this species and the C. hrevirostris I proposed the genus 

 Lipomyzon, on the supposition that the phar3^ngeal bones and 

 teeth of G. liorus were like those of the genus Catostomus, from 

 which those of these species differ in their greater attenuation. 

 During the summer of 1882, 1 obtained a number of specimens of 

 C. liorus, and find that while its pharyngeal bones are less atten- 

 uated than those of G. luxatus, they are more so than in some 

 species of Catostomus, so that I cannot distinguish, generically, 

 the species of Klamath Lake. The pharyngeals of G. brevirostris 

 are not more attenuated than those of G. liorus. 



CATOSTOMUS Le?. 

 Catostomus labiatus Ayres. Cope, American Naturalist, 1879, p, 785. 



This species abounds in Klamath and Goose Lakes, but I did 

 not observe it in any of the lakes to the eastward of these. The 

 formulae are : — 



Klamath Lake: scales, 10-14-11 ; radii D. 1. 11 ; V.IO ; head 45 

 times in length ; eye 5"5 times in head. 



Goose Lake; scales 12»-13 — 15 — 11 ; radii ; D. I. 11 ; V. 10 ; eye 

 6 ; head 4*5 times in length. 



The largest specimens measure twelve inches in length. 

 Remains of species of this family are abundant in the pliocene 

 sands of Oregon, but do not represent many species. Phar3^ngeal 

 bones and teeth indicate that the species are true Catostomi. 



Crania and other bones of one of the species have been found 

 abundantly at Fossil Lake. In some of the specimens the 



