]_g PHILIPPINE POMACENTRIOE 



Body oblong, with the anterior dorsal profile nearly straight ; 

 depth 2.4 in length; head 3.5; depth of caudal peduncle 6.4. 

 Interorbital space slightly convex, 3.3 in length of head, or 

 about as wide as length of snout or diameter of eye. Maxil- 

 lary extending posteriorly to below front edge of orbit, its length 

 greater than the width of the interorbital space. Teeth in a 

 single row, conical, with blunt tips. Suborbital with pointed 

 spines; posterior edge of preopercle with few blunt serrations; 

 the other opercular bones with radiating ridges which terminate 

 in sharp spines. 



Scales on top of head extending to above front edge of orbit ; 

 none on orbital ring and preopercular edges. Dorsal fin with a 

 slight notch superiorly. Spinous dorsal rather low, the fourth 

 spine highest. 



Yellowish orange in alcohol, with a light center on each scale ; 

 a trace of the blue line present on middle of forehead, at base 

 of dorsal fin, and on back of caudal peduncle. 



Described from a single specimen, 45 millimeters in length, 

 collected at Calapan, Mindoro. 



This species, which is new to the Philippines, is known from 

 the coasts of Priaman, Bouro, Ceram, and Amboina. It closely 

 resembles Amphiprion perideraion Bleeker, and differs from it 

 in the absence of the vertical pearl white band on the opercles. 



Genus PREMNAS Cuvier 



Premnas CUVIER, Regne Anim. ed. 1 (1817) 106; biaculeatus. 



Body ovate, compressed. Each jaw with a series of small, 

 conical teeth. All the opercles serrated; orbital ring with two 

 strong spines. Scales small, about 66 to 72 in longitudinal 

 series; lateral line ending below the posterior portion of soft 

 dorsal. Dorsal fin continuous, notched, with 10 spines. 



Only a single species is known of this genus. 



PREMNAS BIACULEATUS (Bloch) 



Chaetodon biaculeatus BLOCK, Ichth. 7 (1797) 7, pi. 219, fig. 2. 

 Premnas biaculeatus BLEEKER, Nat. Tijd. Ned. Ind. 6 (1854) 105; 



GUNTHER, Cat. Fishes 4 (1862) 10; BLEEKER, Nat. Verb. Holl. 



Maats. Wet. 2 (1877) 17; Atlas Ichth. 9 (1878) pi. 402, figs. 7 and 



9; DAY, Fishes of India (1878) 380, pi. 80, fig. 5; WEBER, Fische der 



Siboga Exped. (1913) 334. 

 Premnas trifasciatus CUVIER and VALENCIENNES, Hist. Nat. Poiss. 5 



(1830) 304. 

 Premnas simicinctus CUVIER and VALENCIENNES, Hist. Nat. Poiss. 5 



(1830) 307, pi. 133, fig. 1. 



