Report of a Mission to Guam. 103 



projecled. The anterior rays of dorsal and anal elongated. First 

 and second dorsal spines ver^^ short; the third greatly produced, 

 ending in a filament about as long as the fish. Pecftorals about 

 equal in length to the ventrals. Caudal peduncle unarmed. Fins: 

 Caudal lunate. Pectorals about equal to length of snout. Ventrals 

 (including filament) about the same length as anal. Colors: Yel- 

 lowish white with three broad, dark, vertical bands, the anterior 

 one forming a somewhat oblique line with anterior of orbit to sec- 

 ond dorsal spine, and extending to midwaj' between pe(5torals and 

 anal; the second extends from the bases of 5-25 anal rays to about 

 8-23 dorsal rays; this dark band broadens out on the anal fin, while 

 on the dorsal it contracts to a point; there is also a narrow line of 

 white in the posterior part of this dark band; the third dark band 

 includes the base of caudal peduncle and about all of caudal fin. 

 The anterior one of these broad black bands is traversed by two 

 more or less distinct narrow blue lines; in larger specimens these 

 are almost obsolete, excepting the line which extends from anterior 

 base of pedlorals to the gill openings. A dusk)- stripe extends from 

 the /\shaped narrow blue line above and on a line with the middle 

 of orbit to the tip of the snout; half-way between orbit and tip of 

 snout a black line branches off on each side from this duskj^ frontal 

 band, and unites with two other dark lines given off near the pre- 

 maxillary, to form a right-angle triangle on each side of the snout. 

 Lower jaw mostly black. Eight specimens, from 2.75-5.25 inches 

 in length, were secured inside the coral reef. Agaha, Guam, Juh' 

 15, 1900. Hab. This is a common and wide-ranging form extend- 

 ing from East Indies and Polynesian islands to Revillagigedo Archi- 

 pelago on the east to western Pacific, Marianas. 



190. Holacanthus cyanotis Giinth. Ugupa Amrilla. 



Head, exclusive of flap, 4; depth 1.86; eye 3.50; the preopercle 

 spine smooth, slightl}" curved, reaching to base of peclorals, 2 into 

 head ; interorbital equal to e5'e ; snout 2 into head; D. xiv 15; 

 A. Ill 16; V. I 5. Scales 48. Preopercle serrated, the strong spine 

 at its loW'Cr angle directed back. Teeth setiform. Branchioste- 

 gals 6. Scales small, and mixed with these are mam' minute ones. 

 Body elevated and strongly compressed. Fins: Caudal rounded. 

 The spinous dorsal commences above the opercles. The pecftorals 

 and ventrals each equal to length of head. Soft dorsal and anal 

 sub-angular posteriorly. Color in life: Yellow; a fine blue ring 

 around the eye and across interorbital; a blue line, as wide as 

 pupil, down the posterior edge of opercle. Fins vellow; dorsal, 

 caudal and anal with a fine marginal line of deep bluish black. 

 In spirits the color fades into a uniform j^ellowish white with a blue 

 line around eye and down posterior margin of opercle; caudal, soft 

 dorsal and anal with a fine marginal line of black. Two specimens. 

 Eength 5 inches. Guam, June 14 , 1900. Hab. Polynesia, Marianas. 



