102 



CALIFORNIA ACADEMY OF SCIENCES. 



The differences between flavipinnis and nasus may be 

 seen from the following: 



flavipinnis. 



Maxillary barbels beyond base of 

 caudal. 



Adipose fin 2 in the length. 



Eye nearly six in head. 



Head compressed behind the eyes. 



Interorbital almost flat. 



Depth above ventrals 5^-5f in the 

 length. 



Greatest width of head 3 ( ?) in its 

 length, its width between maxillary 

 barbels 3. 



Eye If in (Stirnbreite) interor- 

 bital. 



Entire upper portion of head 

 covered with a net work. 



Distance of adipose from dorsal } 

 the length of the dorsal. 



Pectoral lower than the dorsal. 



Upper half of body reddish-brown . 

 Lower half of body yellow. 

 Several rows of brown spots on 

 upper half of body. 



Length to base of caudal .267 m. 



nasus. 



Maxillary barbels to end of adi- 

 pose. 



Adipose fin 2 in the length. 



Eye 8 in head. 



Head not compressed behind the 

 eyes. 



Head everywhere strongly convex 

 in a cross-section. 



Depth above ventrals 4| in the 

 length. 



Greatest width of head 1 in its 

 length, its width between maxillary 

 barbels 3. 



Eye 2 1 in the interorbital. 



Upper portion of. head not cov- 

 ered with a network. 



Distance of adipose from dorsal 

 equals the diameter of the eye. 



Pectoral higher than the dorsal 

 (damaged) equal to the head. 



Caudal lobes equal, longer than 

 the head. 



A dark humeral area, otherwise 

 plain yellow. 



Length to base of caudal .34 m. 



Elongate fusiform, the back compressed, trenchant; 

 width, above the ventrals, If in the greatest depth. 

 Head short, flat below, regularly convex above; profile 

 very steep and almost straight. The thick skin obliter- 

 ates the outlines of all the bones. Occipital process 

 long and narrow, not reaching half way to the first 

 dorsal ray, not to the dorsal plate. 



Eye small, its anterior margin equidistant from the 

 snout and the free border of the opercle; its diameter 4 

 in the snout, 8 in the head, 2J in the interocular. 



Posterior nasal opening a transverse slit. 



Maxillary barbels reaching to the end of the adipose 



