﻿FISHES, GENUS ECSENIUS^ — CHAPMAN AND SCHULTZ 517 



between spines 1 and 2, another between 2 and 3, another between 5 

 and 6, another near end of 7, and another near ends of spines 8 and 

 9, last two spots thickened and involving the spines (on one speci- 

 men only the tliird and fifth of these dorsal spots are present) ; 

 anal clear, narrowly edged with black; caudal dusky distally but 

 with no actual markings and transparent; paired fins clear. Female: 

 Like male except that the body is plain brown without the markings 

 so typical of the male. 



Re/marks. — As in most other species of the genus, the males and 

 females of this species cannot normally be differentiated by the ex- 

 ternal sex organs. Examination of the gonads of the types of both 

 jmlcher and anomalus demonstrates that the former is the male, the 

 latter is the female of the species. It is quite possible that this is the 

 cognate in the western Indian Ocean of opsifrontalis from the Marshall 

 Islands and pro-ocuUs from the Solomon Islands. 



ECSENIUS LIVIDANALIS, new species 



FiQxmE 91 



Holotype. — U.S.N.M. No. 144723, male, 34 mm. in standard length, 

 collected by Chapman and Cheyne at Munda, New Georgia, Solomon 

 Islands, June 15, 1944. 



Parafypes. — ^U.S.N.M. No. 144291, 3 specimens, 24 to 33 mm., col- 

 lected with holotypo and bearing same data; U.S.N.M. No. 144292, 

 6 specimens, 24 to 30 mm., collected by Chapman and Cheyne in Munda 

 Lagoon, New Georgia, Solomon Islands. 



Description. — Dorsal rays XII,12-13; anal 11,13-14; pectoral 13; 

 pelvic 1,3. 



Nasal cirrus simple, slender, pointed, equal to about half diameter 

 of pupil in length; forehead projecting slightly, but profile rounded; 

 a single, tiny canine on each side below, rather far forward and 

 no more than one-third the size of labial teeth ; lateral tooth occasion- 

 ally set off a little from the labial teeth; depth 3.6 to 4.3, head 3.3 to 

 3.5, both in standard length; spinous dorsal slightly rounded ante- 

 riorly, a little lower than soft dorsal ; younger specimens show slight 

 notch between spines and rays but older specimens have no notch, 

 only a difference in level between spines and rays ; last spine does not 

 come up to edge of fin membrane and is only two-thirds height of 

 next spine; membrane attaching last dorsal ray to caudal peduncle 

 reaching over first two or three small caudal rays; last ray of anal 

 similarly attached to caudal peduncle; genital papilla of female simi- 

 lar to that of SalaHas and hides first tiny anal spine ; second anal spine 

 half length of first ray ; anal highest in middle where it is two-thirds 

 height of soft dorsal; male genital tube slender, nearly as long as 

 first anal spine and situated midway between it and anus; caudal 



