122 



CALIFORNIA ACADEMY OF SCIENCES 



In life, grayish brown above, with bluish and greenish reflections, bright silvery below. The 

 dorsal and caudal are dusky, the caudal often with narrow blackish margin, but without any deepening 

 of color in the lower lobe. Ventrals and anal unmarked. Upper half of axil black, the inner face of 

 the pectoral dusky, especially in its upper portion. Gill-cavity more or less dusky. 



Measuremeyits in Hundredths of Length without Caudal. 



Length to caudal base, in mm 



Depth 



Head from tip of upper jaw 



Eye between adipose eyelids 



Maxillary 



Least width of suborbital (bone only)... 

 Interorbital width above middle of eye... 



Length of third dorsal spine 



Length of soft dorsal base 



Height of anal 



Length of pectoral 



Length of ventrals 



Length of caudal (middle rays) 



Least height of caudal peduncle 



229 



21 



3oi 



5l 

 Hi 



1 1 



36 



24 



144 

 21 



226. Nebris occidentalis Vaillant. 



GUAVINA. 



Nebris zestus Jordan & Starks (Jordan & Evermann, 1898, p. 1417). 



Abundant. 



In Sagenichthys, Isopisthus and Nebris, we have genera each of wliich is 

 represented by one species on the Pacific coast of Central America, and a supposedly 

 different, but very closely related representative form in the Atlantic. Unfortunately> 

 we have no Atlantic material for comparison in any of these cases. This is to be 

 regretted the more, as no direct comparisons have ever been made, and the distinctive 

 characters relied upon may prove to be fictitious. 



