THE FISHES OF SAMOA. 281 



820. Pomacentrus tripunctatus Cuvier & Valenciennes. Vanicolo; Fiji; East Indies. 

 Pomacentrus tripunctatus Cuvier & Valenciennes, Hist. Nat. Poiss., v, 421, 1830, Vanicolo. 



i Pomacentrus trilineatus Ehrenberg in Cuvier & Valenciennes, op. cit., V, 42S, 1830, Red Sea. Sauvage, Poiss. 



Madagascar, 423. 

 Pomacentrus Ueniometopon Kner, Sitz. Ak. Wis. Wien 1838, 56, Kandavu. 



This species was not taken by us. The black ocellus on the back of the tail seems to be a distinc- 

 tive character. It is doubtful whether Pomacentrus dorsalis of Japan is the same species. 



821. Pomacentrus amboinensis Bleeker. New Guinea (Macleay) - 



822. Pomacentrus bankanensis Bleeker. Guam; East Indies. 



823. Pomacentrus semifasciatus Gunther. Boston I., Marshall Group. 

 Pomacentrus semifasciatus Gunther, Fische <ler Siidsee, 226, with plate, 1873, Boston I. 



This species was not seen by us. 



824. Pomacentrus jenkinsi Jordan & Evermann. Hawaii. 



825. Pomacentrus analis Macleay. New Guinea. 

 Pomacentrus analis Macleay, Proc. Linn. Soc. N. S. W. 18S3, 364. 



826. Pomacentrus melanopterus Bleeker. Tusina; Tu'u'u. Samoa; East Indies. 

 Pomacentrus megalops Sauvage, Poiss. Madagascar, 426; after Lienard. 



Ten specimens from Apia. This species is easily separated from P. nigricans and other black 

 species by the large black spot covering the whole base of the pectoral. From most of the black 

 species it may be known by the presence of 13 dorsal spines, there being but 12 in P. nigricans and P. 

 lividus. 



Life colors of a specimen from Apia, called tu'u'u, all black, a large jet black spot or cross bar on 

 base of pectoral; belly with coppery shade; gray spots on scales. 



827. Pomacentrus littoralis Kuhl & Van Hasselt. Tahiti; Caroline Is. ; Waigiu; Guam; Shortland 



I.; Raiatea and Makatea (Seale); East Indies. 



This species is distinguished by the presence of 13 dorsal spines, a plain dusky coloration with a 

 black spot on the tip of the opercle only, and a strongly serrate suborbital. In P. inornatus, which is 

 similarly colored, this bone is nearly entire. In P. nigricans, P. lividus, and its allies or variations 

 there are 12 dorsal spines. 



This species was not taken by us. The species called P. emarginatus and P. chrysui-us are almost 

 certainly identical. They would be certainly placed in P. littoralis were it not stated that the caudal 

 is yellow, and there is no mention of an opercular spot. According to Sauvage, the l.ltoralis of Bleeker 

 is a different species, properly called Pomacentrus pristiger Cuvier & Valenciennes. 



828. Pomacentrus inornatus De Vis. Samoa. 



Pomacentrus inornatus (misprinted niomalus) De Vis, Proc. Linn. Soc. N. S. W. 1884, 451, South Seas. 



Three specimens from Apia. This fish is plain blackish, without spot. The nose is distinctly 

 blacker than the rest of the body. There are 13 dorsal spines, largely enveloped in the scaly sheath, 

 and the suborbital is almost entire, without the strong retrorse serrations seen in most of the other 

 black species. The species is certainly identical with P. inornatus of De Vis. Pomacentrus emarginatus 

 seems to differ in the strongly serrated preorbital. 



829. Pomacentrus nigricans Lacepede. Tu'u'u. Samoa; Fiji; Tonga; Palau; Ponape; Tahiti; 



Raiatea; Marquesas I. and Fate (Seale); East Indies. 

 {Pomacentrus scolopscus Quoy & Gaimard; Pomacentrus txniops Lesson.) 



This species is very abundant in all the pools on all the coral reefs of Upolu and Tutuila. It may 

 be known from its intimate associate, P. lividus, with which Bleeker has confounded it, by the narrow 

 preorbital, more extensively scaled forward. In both species there are 12 dorsal spines, and the 

 preorbital is strongly serrated. Usually the color of the body is plain dusky olive, without blue 

 spots. The dusky spot or shade on soft dorsal and on axil of pectoral is variously developed, some- 

 times very distinct, sometimes obscure. The blue stripe on the suborbital is usually but not always 

 distinct. 



B. B. F. 1'.'05 — 19 



