2Q PHILIPPINE POMACENTRID.E 



This species ranges from the seas of India throughout the 

 East Indian Archipelago to New Guinea. 



Genus DASCYLLUS Cuvier 



Dascyllus CUVIER, Regne Anim. ed. 2 (1829) 91, aruanus; also written 



Dascillus. 

 Tetradra'chmum CANTOR, Malayan Fishes (1850) 241, aruanus. 



Body ovate or nearly orbicular. Teeth villiform, small and 

 conical, in a narrow band, with an outer series of somewhat 

 larger ones. Scales 26 or less in longitudinal series; lateral 

 line ceasing below the soft dorsal fin. Preopercle and sometimes 

 the orbital ring and opercular bone serrated. Dorsal fin not 

 notched, with 12 or 13 spines ; caudal fin with two or more free 

 sharp spines on each margin of base. 



This widely distributed genus occurs from the Red Sea and 

 east coast of Africa through the seas of India and the Malay 

 Archipelago to Polynesia and New Zealand. 



Key to the Philippine species of Dascyllus. 



o\ Median dorsal spines longer than the rest; body with three distinct 



black crossbands. 



6 1 . First two bands vertical; caudal fin with a large black blotch. 



D. melanurus. 



V. First two bands oblique; caudal fin without a black blotch D. aruanus. 

 o j . Premedian dorsal spines longer than the others. 



c*. Body with milk white spot on each side D. trimaculatus. 



c*. Body without any milk white spot. 



ef. Body with one or two broad crossbands D. marginatus. 



d*. Body not banded D. caudofasciatus. 



DASCYLLUS MELANURUS Bleeker 



Dascyllus melanurus BLEEKER, Nat. Tijd. Ned. Ind. 6 (1854) 109; GiJN- 

 THER, Cat. Fishes 4 (1862) 12; Fische der Siidsee 2 (1876) 23>, 

 pi. 124, fig. C; BLEEKER, Nat. Verh. Holl. Maats. Wet. 2 (1877) 149. 



Tetradrachmum melanurus BLEEKER, Atlas Ichth. (1878) pi. 409, fig. 

 1. 



Dorsal XII, 11 to 13; anal II, 12 or 13; scales in lateral series 

 25; with tubules 16 or 17; between lateral line and origin of 

 dorsal 3; between lateral line and vent 9. 



Body ovate, rather deep, 1.6 to 1.7 in length; head 2.6 to 3; 

 depth of caudal peduncle 5.3 to 5.9. Interorbital space slightly 

 and evenly arched, rather broad, 2.5 to 2.7 in length of head; 

 eye rounded and large, 2.7 to 3 in head ; snout blunt and short, 

 3.4 to 3.8 or shorter than maxillary which is contained 2.8 to 3.1 

 in head. Mouth very oblique, jaws equal, the posterior end of 

 maxillary under or a little before front margin of eye. Teeth 



