Report of a Mission to Guam. lor 



form also has more dusky on the upper part of body. Two speci- 

 mens, length about 2.50 inches, were secured inside the coral reef 

 near Agaiia, Guam, July, 1900. Hab. Seas of India, Andaman 

 Island to Malay Archipelago, Polynesia, Marianas. 



176. Chsetodon fulcula Bloch. 



Head 3; depth about i .50; eye 3.75 into length of head; D. xii 26; 

 A. Ill 23. Snout rather produced, longer than diameter of eye. 

 Scales 6-29-16. The black ocular band beginning at a distance 

 equal to the length of the first dorsal spine anterior of the base of 

 dorsal fin, and extending through the eye to isthmus, the lower 

 part broadest. Teeth setiform. Fins: Posterior of dorsal and anal 

 rounded. Dorsal spines stout and slightly curved; the median 

 ones are longest. Caudal square, pedlorals and ventrals are about 

 equal length. Color whitish with two dusky bauds about as wide 

 as the length of caudal fin. These black bands extend from the 

 dorsal to half-way down the sides of the fish, where they end indis- 

 tin(5lly; the first from 1-5 spinous dorsal, the second from 8-12 

 spinous dorsal. Posterior of this last black line the color is a bright 

 yellow, including all the soft dorsal, caudal and anal. The caudal 

 peduncle has a round black spot near the middle. The caudal has 

 a narrow black intermarginal band of white; the soft anal has two. 

 There are about 19 subcutaneous, narrow, blackish, oblique lines 

 passing down the body. Variations: This species is undoubtedly 

 subject to a large amount of variation. In Garrett's "Fisches d. 

 Sudsee" the two dark vertical bands from the dorsal are conjoined 

 superiorly and extend so far as the fourth dorsal spine, and end 

 sharply on about the middle of the sides, /. e., on a line with snout 

 and middle of caudal peduncle. And the body bands sometimes 

 have white edges. In Day's "Fishes of India" these black bands 

 are less wide and extend only to about the lateral line, while the 

 caudal peduncle has a complete black band. Only one specimen 

 was secured. Length 4.50 inches. Coral reef, Guam, May 29, 

 1900. Hab. Sea of Batoe, Seas of India to Malay Archipelago, 

 Marianas. 



177. Chsetodon strigangulus (Solander). Sea Butterfly. 



Head 3.20; depth 1.75; eye 3 into length of head; D. xiv 15; 

 A. Ill 18. Scales 26 in the lateral line. Fins: Pedlorals, ventrals, 

 anal and dorsal w^hite; the latter two tinged with ^-ellowish and 

 tipped with black. Caudal black, tipped with white, through which 

 runs a fine black line. Mouth small, teeth minute. Color: Body 

 whitish wdth about twenty-five black stripes angularly bent, with 

 the angle pointing forward. A black ocular band, edged with 

 white, not quite so broad as eye. One specimen, 4.50 inches in 

 length, was secured inside the reef. Guam, July 14, 1900. Hab. 

 From the Red Sea to Polynesia, Marianas. 



