DAYA 73 



rayed dorsal and on the caudal peduncle; dorsal fin brownish 

 violet, with a blackish edge to the spinous portion; caudal 

 slightly yellowish near base and brownish outwardly; posterior 

 third of anal black, remaining portion whitish ; pectoral slightly 

 grayish with a small black spot superiorly at its base and axil ; 

 eye golden yellow, with a tinge of brownish violet above. 



In alcohol the ground color is yellowish brown, fading into 

 whitish below; dorsal fin yellowish brown; tail and base of 

 caudal yellowish, rest of the fin grayish; anal black on its 

 posterior third and whitish violet on the remaining portion; 

 pectoral and ventral grayish, the former with a small black 

 spot superiorly at its base and axil. 



Here described from a single specimen, 95 millimeters long, 

 collected by Mr. M. Brown, August 5, 1926, at Tablas, the 

 largest island in Romblon Province. 



Genus DATA Bleeker 



Daya BLEEKER, Nat. Verb. Holl. Maats. Wet. 2 (1877) 71; jerdoni, 

 Body oblong, elongate. Teeth In a single series, the middle 

 ones short and large, almost flattened. Preopercle finely ser- 

 rated as are the angle of opercle and the contiguous portion of 

 subopercle; orbital ring entire. Scales of moderate size, about 

 30 or less in a longitudinal series; lateral line ceasing below 

 soft dorsal fin. Dorsal fin continuous, not notched, with 13 

 spines. 



I am obliged to separate this genus from Pomacentms, from 

 which it differs in the serration of the opercular and sub- 

 opercular bones. 



There is apparently but a single species, which is rare on 

 the coast of India and in the seas of the Indo-Australasian Ar- 

 chipelago. 



DATA JERDONI (Day) 



PLATE 15, no. 1 



Pomacentrus jerdoni DAY, Proc. Zool. Soc. (1873) 237; Fishes of 

 India (1878) 383, pi. 80, fig. 7; EVERMANN and SEALE, Bull. U. S. 

 Bur. Fisheries 26 (1907) 89. 



Daya jerdoni WEBER, Fische der Siboga Exped. (1913) 344. 

 Dorsal XIII, 12 or 13; anal II, 12 to 14; scales in lateral 

 series 28 to 30; with tubules 19 to 21; between lateral line 

 and origin of dorsal 6; between lateral line and vent 10. 



Dorsal and ventral outlines of the oblong, elongate body 

 similar; depth 2.5 to 2.6 in length; head 2.9 to 3.6; depth of 

 caudal peduncle 7.1 to 8. Interorbital space with a low de- 

 pression extending forward to tip of snout, its width contained 



