122 



CALIFOENIA 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. 



Measurements 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 



51 



14J 



1 1 

 36 

 1 4 

 24 

 i4i 

 21 

 8 



226. Nebris occidentalis Vuillant. 



GUAVINA. 



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



Abundant.' 



In Sagenichthys, Isojnsthus and Nebris, we have genera each of which 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. 



