54 U.S. NATIONAL MUSEUM BULLETIN 2 02 Vol. 2 



AMPHIPRION PERIDERAION Bleeker 



Plate 79, B 



Amphiprion perideraion Bleeker, Nat. Tijdschr. Nederl.-Indie, vol. 9, p. 437, 



1855 (type locality. Obi Major). — Montalban, Bur. Sci. Manila Monogr. 



24, p. 16, pi. 4, fig. 1, 1928 (Philippine Islands).— Schultz, Proc. U. S. Nat. 



Mus., vol. 103, p. 191, pi. 9,B, 1953. 

 Prochilus perideraion Bleeker, Atlas ichthyologique . . ., pi. 400, fig. 1, 1878. 

 t Amphiprion rosenbergi Bleeker, Act. Soc. Sci. Indo-N^erl., vol. 6, p. 16, 1859 



(type locality, New Guinea) ; Atlas ichthyologique . . ., vol. 9, pi. 402, fig. 



2, 1877. 

 Amphiprion nigripes Regan, Trans. Linn. Soc. London, ser. 2, zool., vol. 12, p. 



230, pi. 24, fig. 2, 1908 (type locality, Maldives, BM 1908.3.23.101, holotype 



examined) . 



SPECIMENS STUDIED 



Bikini Atoll: 1 station, 1 specimen, 39.5 mm. in standard length. 

 Rongelap Atoll: 1 station, 1 specimen, 23 mm. 



Description. — Dorsal fin rays X,15 or 16; anal 11,13; pectorals 

 ii,15; scale rows 50, with 5 or 6 rows between lateral line and base of 

 dorsal, 19 between origin of anal and lateral line; perforated scales in 

 lateral line 35. 



Depth of body 2.14; length of head 3.3; both in standard length. 

 Snout 3.43; eye 3.25; preorbital width 7.5; length of upper jaw 2.8; 

 postorbital part of head (hind margin of eye to upper edge of gill 

 opening) 2.8; interorbital width 3.25; depth of caudal peduncle 1.88; 

 length of pectoral fin 1.29; length of pelvic fm 1.41; length of 3rd 

 dorsal spine 2.61; length of middle caudal rays 1.02; all in length of 

 head (tip of snout to tip of longest opercular spine). Angle of snout 

 profile with lengthwise axis of body 61 degrees; snout profile convex. 



Body oblong, preorbitals and suborbitals with strong spines, pre- 

 opercle serrate, spines far apart; opercle and subopercle with strong 

 radiating spines. Anterior spines of dorsal distinctly longer than 

 posterior, so dorsal appears notched, soft dorsal and anal low, rounded, 

 caudal rounded. 



Color in alcohol. — Head and back Hght yellowish brown or reddish 

 brown; sides and belly dirty grayish; a vertical chalky white line, 

 narrower than eye but broader than pupil, extending from temporal 

 region across anterior part of opercle, ending at lower margin of 

 subopercle; a dark reddish brown median line from interorbital area to 

 origin of spiny dorsal ; all fins pale yellowish. 



Remarks. — This species has been reported from the East Indies, 

 Philippine Islands, and Palau Islands but not previously from Micro- 

 nesia. It is best recognized by the narrow white band on the mid- 

 dorsal line of head, beginning between front of eye and extending to 

 dorsal origin, along with a narrow white vertical bar on rear of head 

 behind eye. Four specimens were studied: USNM 141032, 141033 



