Repoi't of a Mission to Guam. 97 



head. Fins: The caudal is slig^htly rouuded, its length 1.66 into 

 head. The longe.st ray of pe(5loral is 1.50 into head, its base 4.50. 

 Ba.se of anal is 1.50 into head, 2.25 into base of dorsal. The ven- 

 trals are short, about 2 into head — about equal to longe.st dorsal 

 spine. Color in spirits: Olive brown, the scales covered with 

 slightly darker centres. All the fins, with the exception of the 

 pectorals, are black. Pecftorals yellowish white, teeth yellowish 

 white, chin whitish, iris yellowish. The young are similarly 

 colored. Two specimens. Length 3-6 inches. Agaiia, Guam, 

 July 14, 1900. This species is chiefly characfterized by the very 

 broad yellowish teeth, which give the snout a very blunt — almost 

 square — tip; by the narrow lip, and the uniform coloring of the 

 body. Hab. Marianas. Type No. 162 B. P. B. M. 



163. Pseudoscarus sumbawensis Bl. 



Head 3; depth 3; eye 5.50; interorbital 3.25; D. ix 10; A. 11 9; 

 V. I 5; P. 14. Scales 2-24-5. Body oblong, compressed. Upper 

 jaw slightl}' the longer. A .sharp canine tooth at angle of upper 

 jaws. Two rows of scales on cheek. The lower preopercular limb 

 is naked. Upper lip very broad, almost covering the upper teeth. 

 The pharyngeal teeth pavement-like, their width 2 into their 

 length. Lateral line is interrupted. Fins: Caudal is emarginate, 

 with angles produced. Pectorals 1.25 into head. Ventrals 1.25. 

 Base of anal 1.50 into head, 2.50 into base of dorsal. Color in 

 spirits: Violet-olive. Dorsal, anal and caudal fins darker. Ven- 

 trals and pedtorals yellowish. Two specimens. Length 3-7 inches. 

 Guam, July, 1900. Hab. Marianas. 



Family CH^TODONTID^.— Coral-flshes. 



Genus CH^TODON (Artedi) Linn^us. 



164-168. Chsetodon ephippium Cuv. & Val. 



Head 3.88; depth 1.66; eye 3.50; interorbital 4; D. xiii 23; 

 A. Ill 22; V. I 5. Scales 9-37-14. Bod}' elevated and .strongly 

 compres.sed. The snout rather produced, the lower jaw longer. 

 Lower edge of the preopercle slightl}' serrated. Branchiostegals 6. 

 Teeth setiform. Fins: Dorsal spines are of moderate strength, the 

 longest spine 2 into head. Posterior part of dorsal and anal rounded, 

 the soft dorsal has a short projedling filament. Caudal square, the 

 longest ray 1.50 into head. Color in spirits: Yellowish white with 

 about 9 indistinct browni.sh longitudinal lines, half as wide as iris, 

 below the axis. A big black patch broadly edged with white an- 

 teriorly occupies all the upper posterior part of the fish, including 

 most of the dorsal fin. Posterior edge of the dorsal yellow, fol- 

 lowed by a narrow black line and terminally tipped with white. 



O. p. B. p. B. M.— Vol. I., No. .^. 



