POMACENTRUS 71 



base of anal fin with a white spot; anal opening jet black; all 

 the other fins yellowish; pectoral with a dusky axillary spot. 



Known from only two specimens, one of which is in the 

 collection of the Bureau of Science and the other at Stanford 

 University Museum. They measure 37 millimeters each, and 

 were collected by Dr. Albert W. Herre at Bungau Island, Sulu 

 Archipelago, in 1921. 



This species is distinct from the other members of this genus 

 in having a series of white transverse lines across the body. 



POMACENTRUS UPISTHOSTIGMA Fowler 



Pomacentrus opisthostigma FOWLER, Proc. Acad. Nat. Sci. Phila. 70 

 (1918). 



Dorsal XIV, 14; anal II, 15; scales in lateral series 26; with 

 tubules 15 or 16; between lateral line and origin of dorsal 3; 

 between lateral line and vent 10. 



Body ellipsoid and well compressed, with back and abdomen 

 equally arched, greatest depth 1.9 to 2 in length ; head 3 to 3.2 in 

 length of body, with upper outline slightly more convex than 

 lower; depth of caudal peduncle 2.1 to 2.3 in length of head or 6.6 

 to 6.9 in that of body. Interorbital space evenly convex and as 

 wide as eye diameter, which is 2.9 to 3.2 in head ; snout bluntly 

 pointed and rather short, 3.2 to 3.4 in length of head and a 

 little longer than maxillary which is contained 3.4 to 3.6 ; width 

 of preorbital behind maxillary less than half eye diameter. Eye 

 circular and a little elevated, its anterior edge above posterior 

 end of maxillary. Mouth small and slightly oblique, jaws about 

 even; the simple small teeth compressed and in a single series. 

 Orbital ring distinctly serrated, first tooth enlarged and followed 

 by a notch; only the hind limb of preopercle serrated; opercle 

 armed with two flat spines behind. 



Orbital ring, edges of preopercle and portion of snout in front 

 of nostrils naked, and rest of head covered with scales. Dorsal 

 spines evenly graduated to the last, which is the highest and 

 1.5 to 1.6 in head; second anal spine lower than last dorsal 

 spine; soft dorsal and. anal rounded; caudal fin a little emar- 

 ginate; pectoral fin as long as head and reaching anus; outer 

 ray of ventral produced into a filament which extends behind 

 anal opening. 



Color in alcohol brown, paler on belly and lower surface of 

 head ; each side of head with some scattered pearl white spots ; 

 two fine pearl white lines converging at snout, present on top 

 of head, and a short one in front of each eye; dorsal fin deep 



