178 BULLETIN 180, UNITED STATES NATIONAL MUSEUM 



dorsal rays XII, 16; anal II, 12, suborbitals with weak spines 

 (in very small specimens tliese spines are undeveloped) ; snout 

 and suborbitals scaled, but preorbital from eye to maxillaries 

 naked, its least depth about 1/2 eye; upper edge of caudal 

 peduncle just beyond soft dorsal with a black area or saddle. 



Pomacentrus aureus Fowler 



12b. Anus same color as body ; color plain brown or blackish ; pelvlcs 



dusky or blackish, no black spot on dorsal edge of caudal 



peduncle ; suborbitals spiny and scaled ; preorbital naked, 



except a scale or two posteriorly. 



ISa. Preorbital wide, its least width equal to eye; scales on snout 



barely reach to nostrils ; upper pectoral base without a 



black spot ; rear base of soft dorsal without a black spot ; 



dorsal rays XII, 15 ; anal II, 13. 



Pomacentrus lividus (Rloch) 



13&. Preorbital narrower, its least width at rear corner of maxillaries 



about one-half to two-thirds eye in adults; scales on snout 



occurring in front of line between nostrils ; upper pectoral 



base with a black spot. 



14a. Body plain black; usually a black spot visible at rear base of 



soft dorsal but sometimes obscure because body and fins 



are as black as the spot ; no white in front of spot and 



no white band across body ; dorsal rays XII, 15 to 17 



(usually 16) ; anal II, 12 or 13 (usually 13) (suborbital 



spines rather weak in this species in small ones). 



Pomacentrus nigricans (Lacepede) 



14?). Dorsal rays XII, 14 or 15; anal II, 11 to 13 (usually 12) : 



color plain blackish either with an obscure wide pale band 



across body or a black spot, white bordered anteriorly. 



15ff. Black spot, bordered with white or pale anteriorly, at 



rear base of soft dorsal. 



Pomacentrus albofasciatus eclipticus Jordan and Seale 

 I'tb. Black spot at rear base of soft dorsal without white area ; 

 pale vertical band across rear half of body somewhat ob- 

 scure in some specimens; an obscure narrow blackish 

 band from front of spiny dorsal ventrally past axil 

 of pectoral fin, visible even when pale band is lacking. 

 Pomacentrus albofasciatus albofasciatus Schlegel and Miiller 

 7b. Preopercle with posterior edge not serrated; teeth incisorlike (table 

 19) (Abiidefduf). 

 16(7. Dorsal spines XIII. 



17o. Dorsal soft rays 15 or 16 and with a color pattern of six ver- 

 tical black bars, sometimes not very distinct, but never a 

 black ocellated spot near base of last four dorsal spines ; anal 

 rays II, 14 or 15 ; from 3i/^ to 4 scales from end of lateral 

 line to base of dorsal fin on body ; suborbitals with a few scales 

 posteriorly, always naked anteriorly ; teeth uniserial, without 

 small ones between the larger ones ; snout not scaled forward 

 to opposite nostrils ; preorbital naked ; upper base of pectoral 

 with a black spot; no black spot on rear base of soft dorsal 

 but a black spot on upper edge of caudal peduncle just behind 

 base of soft dorsal ; anus colored like body. 



Abudefduf sordidus (ForskSl) 



