THE FISHKS OF SAMOA. 281 



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

 I'miHicciitnts trlimiicftifu^ Cnvier & Valenciennes, Hist. Nat. Poi.ss., V, 421, 1830, Vanicolo. 



i l^iiinttrnilrus trilincutus Ehrenberg in Cuvier & Valenciennes, op. cit., v, 428, ISHO, Red Sea. Sauvage, Poiss. 



Madagascar, 423. 

 Pumactntnis kriiwmelopon Kner. Sitz. Ak. Wis. Wien 18J8, 5G, Kandavu. 

 Thi.s sjiecies was not taken by us. The black ocellus on the Iwck of the tail seems to be a distinc- 

 tive character. It is doubtful whether Pomacenlrus dorsalis of Japan is the same sjiecies. 



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



822. Pomacentrus bankanensis Bleeker. Guam; East Indies. 



823. Pomacentrus semifasciatus Giinther. Boston I., Marshall (iroup. 

 I'umanntriis scmifdsciatus GiiiitlicT, Fische fler Siidsee, 22(5, with plate, 1873, Boston I. 



This species was not seen by us. 



824. Pomacentrus jenkinsi Jordan & Evernianii. Hawaii. 



825. Pomacentrus analis Macleay. New Guinea. 

 P.jjiiamifrus analis .Macleay, Proc. Linn. Soc. N. S. W. 18S3, 3G4. 



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

 Pomarentrns inegalops Sauvage, Poiss, Madagascar, 426; after Li^nard. 



Ten spetdniena from Apia. This species is easily separated from P. nigncans 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. 

 lindiis. 



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 



1.; Raiateaand Makatea (Seale); East Indies. 



This sjiecies 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. inornalm, 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 /'. , jNinyiiinliix and P. chrysurus are almost 

 certainly identical. They would be certainly placed in P. Iiii.n'ilis \v< re it not stated that the caudal 

 is yellow, and there is no mention of an opercular spot. Accurdiu-^- t<i Sauvage, iheldtoralis of Bleeker 

 is a different species, properly called Pomacentrus pristiger Cuvier & N'alenciennes. 



828. Pomacentrus inornatus De Vis. Samoa. 



Pomacentrus inornatus (misprinted niomatus) De Vis, Proc. Linn. Soc. X. S. \V. 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. Pomacenlrus emarginatus 

 seems to differ in the strongly serrated preorbital. 



829. Pomacentrus nigricans Lac^pede. Tu'u'u. Samoa; Fiji; Tonga; Palau; Pmiaiie; Tahiti; 



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

 {J'oinacentrus sculoiiscus Quoy & Gaimard; Pomacentrus tseniops Lesson,) 

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

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

 preorbital, more e.xtensively 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 sulicirbital is usually but not alwavs 



B. B. I-M'.lO.S— 19 



