232 CALIFORNIA ACADEMY OF SCIENCES. 



nuchal filaments. It is named for Mr. Edwin Chapin 

 Starks, in recognition of his work on the fishes of the 

 Pacific Coast. 



29. Exerpes asper (Jenkins & Evermann). 



Auchenopterus asper Jenkins & Evermann, Proc. U. S. Nat. Mus., 

 1888, 154. Guaymas. 



The widely separated and ribbon-like first dorsal fin, 

 formed of three close set spines, may distinguish asper 

 generically from the other species of Auchenopterus. 

 The genus Exerpes Jordan & Evermann, based on it, is 

 further distinguished by the long, sharp snout, and the 

 long ventrals. The species has been well figured by 

 Jenkins & Evermann. (Proc. U. S. Nat. Mus., 1891 ; 

 plate II.) 



30. Chasmodes jenkinsi Jordan & Evermann, n. sp. 

 Plate xxxix. 



Hypsoblennius striatus Evermann & Jenkins, Proc. U. S. Nat. 

 Mus., 1891, 163, Guaymas, not of Steindachner. 



Head 3J3 (4 in total); depth 4 (5). D. XII, 17; A. 

 18 or 19; eye 4 to 5 in head. 



Body more robust than in related species, resembling 

 Hypsoblennius; head large, gently rounded in profile, 

 the snout steep, 4 in head; interorbital space narrow, 

 grooved; orbital tentacle (male) much as in Hypsoblen- 

 nius o-Hberti, about 3 in head, branched, the branches 

 usually 4; mouth much larger than in Hypsoblennius, the 

 maxillary 2^ to 3 in head, reaching to below posterior 

 margin of eye; teeth even, comb-like; gill opening 2 in 

 head, extending downwards nearly to lower edge of pec- 

 toral, much larger than in Chasmodes saburrce. Dorsal 

 little notched, the spines slender, 1]/^ in head, the rays a 

 little higher; anal lower, the rays 3^2 to 4 in head; pec- 

 torals reaching anal, 1^3 in head; ventrals 2^. Dorsal 

 and anal free from caudal. 



