298 CALIFORNIA ACADEMY OF SCIENCES. 



reaching a little beyond origin of ventrals, the outer 

 edge smooth, the inner with sharp recurved teeth. 



Pectoral pore large. 



Nearly plain, the back somewhat darker than below, 

 the inner rays of pectoral and ventral fins dusky; tips of 

 the anterior rays of the anal dusky; fins otherwise plain 

 light. 



Head 5; depth at dorsal spine 5; greatest depth 4|; 

 D. I, 6; A. 46; V. 13-14. 



Type No. 7289, one specimen, length .12 m. Coary. 

 L. Agassiz. 



234, Auchenipterus brachyurus, 



Evanemus brachyurus Cope, Proc. Am. Philos. Soc. xvii, 676, 1878 



(Peru). 

 Auchenipterus brachyurus Eigenm. & Eigenm. Proc. Cal. Acad. 2d 



Ser. i, 152, 1888 (name only). 



This species is known only from the types. 



LIII. TETRANEMATICHTHYS. 



Tetranematichthys Bleeker, Nederl. Tijdschrift, Dier- 

 kunde, i, 108, 1863 (quadrifilis) . 



Type: Ageneiosus quadrifilis Kner. 



Barbels four, two below the angle of the mouth; top 

 of head granular, without covering; air bladder with- 

 out bony covering; otherwise as Ageneiosus. 



235. Tetranematichthys quadrifilis. 



Ageneiosus quadrifilis Kner, SB. Ak. Wien, xxvi, 442, 1857, pi. ix, 



fig. 29 (Rio Guapore). 

 Tetranematichthys quadrifilis Giinther, Cat. Fish. Brit. Mus. v, 193, 



1864 (copied). 



Snout semicircular; upper jaw scarcely projecting; 

 the mandibulary barbels extending to below the ey; 

 eye small. Pectoral spine shorter than the dorsal spine; 

 caudal truncate. Lateral line simple. Uniform brown. 

 Head 3; depth 4; D. I, 6; A. 41; V. 7. (Kner.) 



