414 BULLETIN 100, UNITED STATES NATIONAL MUSEUM 



A. 1549. Nan Wan Bay, Formosa. January 25, 1910. Length, 290 mm. 



(Canines, upper, 1 — 1; lower, 2 — 2.) 

 A. 1616. Nafa, Riu Kiu Islands. February 7, 1910. Length, 315 mm. (Canines, 



upper, 3 — 1; lower, 1 — 1.) 

 51820 U.S.N.M. Pago Pago, Samoa. Bureau of Fisheries. 1 example. 



Length, 2S0 mm. (Canines, upper, 1 — 1; lower, — 0.) As Callyodon 



bataviensis. 

 55935 U.S.N.M. Zamboanga. Philippine Commission. 1 example. Length, 



273 mm. (Canines, upper, 2 — 1; lower, 1 — 1; preopercle, — 0; slight neutral 



spot at pectoral origin.) As Callyodon oktodon. 

 55991 U.S.N.M, Bacon, Philippine Commission. 1 example. Length, 213 



mm. As Callyodon balinensis. 

 66014 U.S.N.M. Jaluit, Marshall Islands, Albatross collection. 1 example. 



Length, 225 mm. As Scarus bataviensis. 

 84197 U.S.N.M, Cebu. Dr. F, Baker, 1 example. Length, 203 mm. As 



Callyodon pronus. 

 52682 U.S.N.M. Hawaiian Islands. Bureau of Fisheries. 1 example. Length, 



343 mm. As Callyodon gilberti. 



CALLYODON MUTABILIS Gray 



Callyodon mutabilis Gray, Cat. Fish. Gronow, 1854, p. 86. Amboina. 

 Pseudoscarus mutabilis Gunther, Journ. Mus. Godeffroy, vol. 8 (16), 1909 



p. 316 (type; Samoa, Pelew Islands). 

 Pseudoscarus pentazona Bleeker, Verslag. Ak. Wet. Amsterdam, vol. 12, 



1861, p. 241. Celebes; Atlas Ichth. Ind. N6erl., vol. 1, 1862, p. 46, pi. 11, 



fig. 1 (Celebes).— Gunther, Cat. Fish. Brit. Mus., vol. 4, 1862, p. 231 



(compiled); Fishes of Zanzibar, 1865, p. 107 (Zanzibar). 

 Pseudoscarus schlegeli Bleeker, Verslag. Ak. Wet. Amsterdam, vol. 12, 



1861, p. 242. Celebes; Atlas Ichth. Ind. N4erl., vol. 1, 1862, p. 48, pi. 12, 



fig. 2 (Celebes). 

 Pseudoscarus pentazona var. schlegeli Weber, Siboga Exp., vol. 57, Fische, 



1913, p. 388 (Rotti). 

 Scarus cypho Seale, Occas. Pap. Bishop Mus., vol. 1, No. 3, 1900, p. 95. 



Agaua, Guam. 



Depth 2}4 to 2H; head 2% to 2^, width 2i^ to 2^. Snout 

 2% to 23^; eye 6 to 7, 2% to 2^ in snout, 2 to 2}4 in interorbital ; 

 mouth cleft 5}4 to dj/g in head; Hps cover teeth; canines usually 

 absent, sometimes 1 or 2 each side above, less frequently 1 each side 

 below; interorbital 3 to 3}4 in head, convex. Gill rakers 22 + 28, 

 fine, slender, flexible, short. 



Scales in lateral line, 17 or 18 + 5 + 2; 2 scales above lateral line, 

 6 below, 4 predorsal; cheek with 2 rows of scales, of which lower 

 row of 5 scales, preopercle flange usually naked. Scales with 22 to 

 30 basal radiating striae, apical 24 to 26; circuli very fine. 



D. IX, 10, I, ninth spine 2J/s to 3^ in head, first ray 2j4 to 3^; 

 A. Ill, 9, I, third spine S^s to 4^, first ray 2% to 2%; cf^udal 

 I pi to 13^, slightly emarginate, ends httle exerted, rounded obliquely 

 in young; least depth of caudal peduncle 2}/^ to 23^5; pectoral 

 13^ to IK; ventral 1^ to 1%. 



Adult pale yellowish-brown on upper surface of head and back 

 anteriorly. Pale band 2 scales wide below first third of soft dorsal, 



