66 



FISHES FROM BRAZIL 



I take pleasure in naming this species for Colonel Jose Joaquim de Car- 

 valho e Aran jo, whose influence and kind hospitality made our stay at Lake 

 Papary possible. 



TABLE OF MEASUREMENTS EXPRESSED IN HUNDREDTHS OF LENGTH, 



SHOWING COMPARISONS BETWEEN ELEOTRIS CARVALHONIS 



AND ELEOTRIS PERNIGER. 



206. Erotelis smaragdus (Cuvier and Valenciennes). 



A few specimens of this species, from 33/2 to 5 inches in length, were 

 seined in a large shallow pool in the sand near the mouth of the harbor at 

 Natal. The pool was isolated from the bay except at high tide. The species 

 was not found in seining elsewhere, or in the rock pools. 



The preoperculimi of this species has the hooked process as in Alexuriis 

 armigcr, and it has as many unbranched accessory caudal rays (12 or 13). 

 These being the characters upon which the genus Alexurus is based it 

 becomes invalid, and armiger should be referred to the genus Erotelis. 



A few specimens of E. smaragdus from Havana, Cuba, were examined 

 in this connection, as well as the type and the only other known specimen of 

 E. armiger. In the Havana specimens the preopercular spine was not so 

 easily seen, the specunens being small, but dissecting the skin away made it 

 very evident. The specific differences between these two are slight and of 

 minor importnace, and they may prove to be identical, but to pass definitely 

 upon this will necessitate more and better material than this at hand. 



207. Awaous taiasica (Lichtenstein) . 



A single specimen was taken at Lake Papary. The following are its 

 life colors. The ground color is yellowish, with golden and greenish reflec- 

 tions about the head. Irregular dusky spots are scattered over the back and 



