1913.1 



NATURAL SCIENCES OF PHILADELPHIA. 



49 



Catostomus occidentalis lacus-anserinus subsp. nov. 



Catostomus labiatus (part) Cope, Proc. Acad. Nat. Sci. Phila., 1883, p. 150. 

 Goose Lake, Oregon. (Not of Ayres.) 



Head 4; depth 4^; D. iv, 10, i; A. iii, 6, i; P. i, 15; V. i, 9; scales 

 66 in lateral line to caudal base, and 4 more on latter; 14 scales 

 above lateral line; 11 scales below lateral line to ventral origin; 

 9 scales below lateral line to anal origin; 40 scales before dorsal; 

 head width If its length; head depth at occiput If; snout 2^; eye 7; 

 mouth width 6; maxillary 3|; interorbital 2f ; first branched dorsal 

 ray 1|; first Ijranched anal ray 1; least depth of caudal peduncle 

 2^; upper caudal lobe 1; pectoral If, ventral If. 



Body elongate, rather robust, sides moderately compressed, upper 

 profile a little more convex than lower, greatest depth at dorsal 

 origin, and all edges convex. Caudal peduncle compressed, its 

 least depth 1| its length. 



Fig. 1. — Catostomus occidentalis lacus-anserinus subsp. nov. 



Head moderate, quite robust, sides compressed with slightly 

 convex surfaces, and upper and lower surfaces equally broad. Snout 

 elongate, conic, upper profile with rather deep depression anteriorly, 

 length about equals width. Eye high, a little elongate or ellipsoid, 

 and centre midway in head length. Mouth small, inferior, snout 

 protruding beyond mandible about half an eye-diameter. Jaws with 

 quite fleshy edges, that of upper somewhat trenchant, and lower 

 broadly obtuse. Disk of lips quite large, length H in snout. Upper 

 lip quite broad, rather thin, slightly protuding in front beyond snout 

 tip, with two or three series of quite large inner papillae, and four or 

 five series of outer and much smaller ones. Lower lip cleft medianly 

 behind nearly forward to symphysis, thick, fleshy, and with about 



