A COLLECTION OF FLSHES FROM SUMATRA. 533 



height, forming a blunt lobe posteriorly. Caudal rounded. Pectoral similar to 

 caudal, rounded, and median rays longest. Ventral inserted well behind pectoral, 

 innermost ray united with abdomen by a membrane for greater part of its length, 

 rounded, and when depressed reaching origin of soft anal. Ventral spine straight, 

 a trifle longer than half length of fin. Anus about midway between tip of ventral 

 spine and origin of anal fin. 



Color in arrack deep clove-brown, paler beneath, and fins also more dilute 

 distally. A broad milky-white saddle, slightly tinted with pearl-graj', extending 

 from occiput and just behind eye till down on middle of opercle. There it gives 

 place to a brownish-black line extending down across interopercle. A similar 

 narrower saddle extends down on back to middle of abdomen from ninth and tenth 

 dorsal spines. This is also continued below- to origin of spinous anal as a blackish- 

 brown line. Caudal peduncle with a similar saddle-like band, becoming narrow^er 

 below. Blackish-brown lines of two preceding saddles extends up narrowly along 

 their edges, forming a dark border. Saddle on caudal peduncle also with similar 

 dark edges. Iris with a yellow ring, otherwise dusky-slate color. Peritoneum 

 grayish-silvery. 



Length 3i|. inches. 



Type No. 27,665, A. N. S. P. Padang. 



Two examples. Bleeker recognized three varieties of Premnas biaculeatus. 

 According to his diagnosis this species approaches near semicinda of Cuvier,^ but 

 both the original figure and that bj" Bleeker" do not agree, as no dark lines are 

 indicated running down from the saddles above. Furthermore, the saddles are of 

 altogether different pattern. The}' do not extend as low, the second blotch hardly 

 extends on spinous dorsal, and last does not entirely encircle caudal peduncle. 



{Epigramma, brand.) 



Subgenus AMPHIPRION Schneider. 



168. Amphiprion ephippiu.m (Bloch). 



ACTINICOLA subgen. nov. 

 Type Luljanus pcrciila Lac^p^de. 



Dorsal deeply notched, though spinous and rayed fins are connected they are 

 also distinct. 



{Acimia, Sea-anemone ; incola, inhabitant. According to Day the following 

 species is commensal in certain Actintzoa.) 



169. AMPHrpRiON PERCULA (Laci^p&de). 



170. D.^scYLLUS ARUANUs (Linnjeus). 



171. Dascyllus trimaculatus (Riippell). 



172. Chromis cinerascexs Cuvier, 



173. Pomacentrus leucosphyrus sp. nov. Plate XIX, lower figure to left. 



Head 3f ; depth 2|; D. XIII, 11; A. II, 11; P. ii, 14; V. I, 5; scales 28 in 

 a lateral series below lateral line to base of caudal ; 8 scales between origin of spin- 



' Hist. Nat. Poiss., V, 1830, p. 307, plate 133, fig. 1. 

 ^ Atlas Ichth., IX, 1878, plate 402 (3), fig. 7. 



