62 MEMOIRS OF THE CARNEGIE MUSEUM. 



309. Chaetodontoplus arcuatus (Gray). (J. & E., p. 378.) 



Described in 1831 from Honolulu, but only the type is as yet kno\Mi. 



Centrc^pyge Kaup. 

 Caudal rounded; scales large above as well as Ix'low lateral line, thirty to 

 forty in a series; suborbital more or less serrate behind, but without strong spine. 

 The original type of the genus, Holaccmthns tihicen, was originally described as 

 having four anal spines. Species of small size and variegated coloration. 



370. Centropyge potteri (Jordan and Metz). (PI. Ill, fig. 1.) 



Hulacanthus potteri Jordan and Metz, Proc. U. S. N. M., XLII, 1912, p. 525. 



Only the type of this dainty species of the reefs was known, until the senior 

 author secured four additional examples from the reef at Honolulu. The largest 

 of these, differing in certain minor respects from the original type, is figured on 

 Plate HI, fig. 1. 



The serrations on the preorbital and preopercle are larger than in the type; 

 the cross-streakings somewhat different. The black blotches above the pectoral 

 have disappeared, and the posterior ]iart of the bod>' is suffused with deep inky 

 purple, almost black, a color which obscures the vermiculations, although these 

 can be traced. In life the dark streaks were dark bluish purple, the paler colors 

 a rich light orange. 



371. Centropyge tutuilae sp. nov. Jordan and Jordan. (J. & E., p. 378. PI. LVI. 

 not description.) (PL III, fig. 2.) 



Holacanthus bispinosiis Gihither, Fische dcr Siidsce, II, 1874, p. 51, PI. LVI, 

 fig. C. Description in part. Not Holacanthus bispinosus Giinther, Cat. 

 Fishes, II, 1860, p. 48, which is based on Bleeker's description of Hola- 

 canthus diacanthus from Amboyna. 

 Holacanthus Mspi7iosus Jordan and Evermann, Fishes of Hawaii, PI. LVI, 

 not description, which was taken from two si^ecimens of Centropyge 

 diacantha. 

 Tyiie: No. 3902 Carnegie Museum. Three inches long. Tutuila, Samoa; 

 paratype, No. 8750, Stanford University. 



Head 4; depth 1.75; eye 3.5 in head; snout 4.25; maxillary 4.25; dorsal 

 rays XIV, 17; anal rays III, 15; scales 35, 18; the number of fin-rays can not be 

 exactly counted, nor the number of scales, as on the caudal ]ieduncle these grow 

 very small. 



Body broadly ovate, evenly rounded, the steep profile somewhat gilibous over 

 the eve. Preorbital narrow, with two rather strong, l)lunt teeth; vertical line of 



