38 PHILIPPINE POMACENTRID^E 



Key to the Philippine species of Pomacentrus. 



a\ Dorsal spines 12. 



ft 1 . Scales on top of head stopping above the nostrils P. lividus. 



b\ Scales on top of head extending almost to tip of snout. 



c 1 . Body with a light crossband P. albofasciatus. 



c 1 . Body without a light crossband , P. nigricans. 



a 2 . Dorsal spines 13. 



<P. Orbital ring smooth or indistinctly serrated. 

 e 1 . Teeth truncate. 



7 1 . Orbital ring naked P. pavo. 



f. Orbital ring scaled. 

 g 1 . Vertical limb of preopercle scaled. 



ft 1 . Anal fin almost wholly dusky; dusky color on dorsal fin ex- 

 tending to fourth ray P. violascens. 



h*. Anal fin entirely yellowish; dusky color on dorsal fin ex- 

 tending to second ray P. bankieri. 



g 1 . Vertical limb of preopercle >naked P. taeniurus. 



e 2 . Teeth slightly rounded at tips P. bifasciatus. 



d". Orbitals distinctly serrated. 



i l . Anterior denticulation of orbital enlarged and followed by a notch. 

 ?. Scales on top of head extending to tip of snout; vertical fins with a 



rather high basal sheath of scales. 



fc 1 . A large black spot at base of pectoral and another at axil of fin. 



P. philippinus. 

 /c 2 . Base or axil of pectoral without any black spot. 



P. Teeth in double series; a very small black spot superiorly at 



axil of pectoral and another above operculum. 

 m 1 . Some bluish lines along forehead; bluish spots on opercles; 



caudal lobes slightly pointed P. tropicus. 



ra 2 . No bluish lines or spots on head; a light vertical streak 



on each scale; caudal lobes rounded P. moluccensis. 



P. Teeth in a single series; no black spots anywhere on body. 



P. popei. 



f. Scales on top of head not extending to tip of snout but stopping in 

 front of nostrils; a low sheath of scales occupying base of 

 vertical fins. 

 w 1 . Teeth in a single series. 



p 1 . Axil of pectoral entirely black P. alexanderae. 



p". Axil of pectoral pale P. grammorhynchus. 



n 2 . Teeth in double series. 



q 1 . Body oblong, rather elongate P. elongatus. 



g 2 . Body ovate, not elongate. 



r 1 . Caudal fin yellow, this coloration abruptly marked from 



the ground color P. dorsalis. 



r 2 . Caudal fin yellow, this color gradually merging in the 



ground color. 



s 1 . A black spot on top of caudal peduncle.... P. tripunctatus. 

 s 2 . No black spot on top of caudal peduncle. 



tV Anus black... P. amboinensis. 



t\ Anus not black P. simsiang. 



