290 BULLETIN OF THE BUREAU of FISHERIES. 



toothed; opercle without spines; head entirely scaled except in front of nostrils; mouth small; a 

 single row of small compressed teeth in each jaw; tips of all the fins except pectorals prolonged mori' 

 or less into filaments; length of fifth dorsal spine L75 in head; pectoral equal to head; filament of 

 ventrals reaching to base of anal, the length of the ordinary rays being much less, 1.20 in head; mid- 

 caudal ray 1.20 in head, the outer caudal rays greatly prolonged. 



Life colors of a specimen from Apia (elongate, with all fins produced), blue-black, paler below; 

 a black bar across base of pectoral; no other marks; fins all dusky-edged in a larger specimen 

 apparently the same. 



Color in spirits, violet black, lighter below; a distinct black base to pectorals; fins blackish, the 

 pectoral and inner part of caudal lighter; the ventrals with slight wash of bluish. 



Of this beautiful species, allied to Ahudefduf cochinchineiisU of Day, we have about ten examples 

 from Apia. The type is no. 51742, U. S. National Museum, length 3.30 inches. 



DASCYLLUS Cnvier. 



Dascyllus Cuvier, Regne Animal, ed. h, 1829a (arumms). 



Tetradrachmwm Cantor, Malayan Fishes, 240, 1851; substitute for Dascyllus on account of the 

 prior Dascillus Latreille, 1796, a genus of Coleoptera. 



866. Dascyllus aruanus (Linnpeus). Mamo. Samoa; Tonga; Tahiti; Fiji; Guam; New Guinea; 



Woodlark I.; JIarquesas Is.; Shortland I. and Raiatea (Seale); East Indies. 

 This beautiful little fish is excessively common in the crevices of the coral reefs about Samoa. 

 About 200 examples were taken liy us. It is generally diffused from Polynesia to the Red Sea, but it 

 does not occur about Hawaii. In life it is grayish dove-color with jet-black cross-bands. 



867. Dascyllus melanurus Bleeker. Ponape; Shortland I. (Seale); East Indies. 



868. Dascyllus trimaculatus (Riippell). Samoa; Louisiades; Aneiteum; New Guinea; East Indies. 

 Of this widely diffused species we obtained three specimens in Samoa. Life colors of a specimen 



from Pago Pago, dusky purplish, the scales dark edged; ventral outline and caudal peduncle brassy; 

 dorsal black, with a row of golden spots; soft dorsal rather pale; caudal and anal bleached and golden; 

 ventral black, some golden; pectoral yellowish, a black axillary spot; a round white sjiot on each side 

 of back, distinct in our specimens, but very faint in others examined, from the Philippines. 



869. Dascyllus albisella Gill. Hawaii. 



This species is rather rare about the Hawaiian Islands, and has never been seen elsewhere. It is 

 very close to Dascyllus trimacidalus, but it has a white vertical bar where the latter species has a white 

 spot. 



870. Dascyllus reticulatus (Richardson). Kandavu; New Britain; Ponape; New (Guinea 



(Mack-ay), 

 //,/„i,,» i;li,'„l„lux Kiiliiir<l>(.ii, Ic-h. Chin., 254, 1838, Canton. 



Tiir.''i ' >,,.,'„ l:i. fkor, Pomacentridfe, 145, 1S77, East Indies, generally common. 



J)„f. '. I! 1.: liiinda, 1,247, Banda. Giinther, Cat., IV, 14, Borneo. Gtinther, Fische der Siidsee, 



-'•;■ l^ !■'>" ^' " r.niMih. I'onape. 



Pmiiwtiitiii^i tniijns,:,„iu^ Kiii-i, Dt-nk. Ak. Wiss. Wien 1869, 348, taf. 8, fig. 24. Kandavu. 

 This species of the East Indies was not taken by us. 



871. Dascyllus unifasciatus (Kner). 



Pomacentrus unifascialm Kner, Sitz. Ak. Wiss. Wien 1868, 348, taf. 8, fig. 24, Kandavu. 

 This species is unknown to us. It is evidently very close to Dascyllus reliculntus, perhaps the same 

 species. 



CHROMIS Cnvier. 



872. Chromis ceeruleus (tJuvierA Valenciennes). I'a lanu-monna; Teatea; Mamo. Samoa; New 



Guinea; Ulea; Palaul.; Paumotul.; Yap; Kingsmill I.; East Indies. (PI. xliv, fig. 1.) 



Helioses cxruleus Cuvier & Valenciennes, Hist. Nat. Poiss., V, 497, 1830, New Guinea, Ulea; said to have 13 dorsal 



spines. 

 Helioses frenatm Cuvier & Valenciennes, op. cit.. 498. Guam; snid to have 13 dorsal spines. 

 Helioses lepisurus Cuvier & Valenciennes, op. cit., 498, New Guinea. 



