152 BULLETIN 10 0, UNITED STATES NATIONAL MUSEUM 



band from fourth and fifth dorsal spines obliquely to include posterior 

 half of soft anal, which in young with median black ocellus large as 

 eye. Rather diffuse brown oblique band along soft dorsal base and 

 reflected as dark triangular blotch on caudal basally above. Ventrals 

 black. Pectoral whitish. Iris brown. 



East Indies, Queensland, Melanesia, Micronesia, Polynesia, Hawaii. 



The fourth dorsal spine is usually more elongated in the young, 

 but it is always with a more or less broadly membranous border behind. 

 Some old examples also show rather large variable trifid or bifid 

 supraorbital spines. 



515. Biri Channel. June 2, 1909. Length 126 mm. 



4638. Bubuan Island. February 14, 1909. Length 97 mm. 



4616. Calangaman Island. March 16, 1909. Length 141 mm. 



1248. Candaraman. January 4, 1909. Length 120 mm. 



7975. Catbalogan, Samar. April 16, 1908. Length 115 mm. 



3889, 3890. Endeavor Strait. December 23, 1908. Length 106 to 140 mm. 



18987. Gubat Bay, Luzon. June 23, 1909. Length 122 mm. 



7748. Jolo market. February 12, 1908. Length 149 mm. 



1103, 1104, 6032, 6081. Little Santa Cruz Island. May 28, 1908. Length 105 



to 157 mm. 

 6789. Malanipa Island. April 29, 1909. Length 165 mm. 

 6241,6272,6278. Medio Island, Galera Bay, Mindoro. June 9, 1908. Length 



148 to 150 mm. 

 8901. Near Palag Bay, Luzon. June 16, 1909. Length 146 mm. 

 447. Pandanon Island. March 23, 1909. Length 84 mm. 

 4778. Port Maricaban. July 21, 1908. Length 140 mm. 

 724. Port Palapag. June 23, 1909. Length 118 mm. 

 9312. Silino Island. April 10, 1909. Length 159 mm. 

 One example. Subig Bay. Januar}^ 7, 1908. Length 26 mm. 

 999, 1000, 1001. Tataan, Simaluc Island. February 20, 1908. Length 100 to 



121 mm. 

 4979. Tataan Island. February 21, 1908. Length 147 mm. 

 5829. Tataidaga Bay. May 15, 1908. Length 128 mm. 



262. Tutu Bay, Jolo, second anchorage. September 19, 1909. Length 115 mm. 

 485. Talisse Island. November 9, 1909. Length 120 mm. 

 A1210. Gomomo Island. December 3, 1909. Length 140 mm. 

 52523 U.S.N.M. Samoa. Bureau of Fisheries. Length 76 to 134 mm. Three 



examples. 



HENIOCHUS SINGULARIUS Smith and Radcliffe 



Heniochus singularius Smith and Radcliffe, Proc. U. S. Nat. Mus., vol. 40, 

 1911, p. 321, fig. 2. Alibijaban Island, Luzon, Philippines, Formosa, East 

 Borneo, Celebes, Gillolo Island. — Herre and Montalban, Philippine 

 Journ. Sci., vol. 34, No. 1, Sep. 1927, p. 77, pi. 18, fig. 2 (Batangas and 

 Quiminatin). 



Depth IH to IH; head 3 to 3}4, width 2 to 2^- Snout 2% to 

 2^ in head; eye sy^ to 4, 1% to 1^ in snout, 1 to 1^ in interorbital; 

 maxillary % to % in snout, 4 to 5 in head; interorbital 3}^ to 3^, 

 broadly convex; above each eye a strong, short, horny spine, less than 

 pupil and little developed in smaller examples; with age obtuse, short 



