104 ACANTHOPTERYGII. 



portion of the tail. Young with a large ocellus on the soft dorsal fin. Seas of India to the Malay Archi- 

 pelago. 



14. Chcetodon melanotics, D. if, A. -£g, L. 1. 37-40. A narrow ocular band : body yellow, with its upper 

 fourth stained with black and black lines along each row of scales : a yellow vertical band on caudal : a short 

 black one at the base of the first four anal rays. Red Sea, seas of India, to the Malay Archipelago. 



15. Chcetodon octofasciatus, D. -r^-Vs-, A. T 3 r , L. 1. 50. Light vertical bands on the body and head. Seas 

 of India to the Malay Archipelago and beyond. 



16. Chcetoclon olicj acanthus, D. ^frfo, A. ys^-tzi L. 1. 46-48. Five vertical brown bands : a dark ocellus 

 at the base of the eighth to twelfth dorsal rays. Seas of India to the Malay Archipelago and beyond. 



A. Willi four anal spines. 



1. Chsetodon plebeius, Plate XXVI, fig. 3. 



Brouss. MS. Brit. Mus. ; Gmel. Linn. p. 1269 (?) ; Cuv. and Val. vii, p. 68. 

 Ghostodon plebejus, Giinther, Catal. ii, p. 5, and Fische d. Sudsee, p. 35, t. xxxii, f. B. 



B. vi, D. JJ^, P. 15, V. 1/5, A. ^ T¥ , C. 17, L. 1. 50, L. tr. 7/15. 



Length of head 1/4, of caudal 1/7, height of body nearly 1/2 of the total length. Eyes — diameter 2/7 of 

 length of head, and 1 diameter from end of snout. Preopercle finely serrated : the maxilla reaches half way 

 to below the front edge of the orbit. Fins — dorsal spines strong, the fourth slightly the longest, the soft 

 portions of the dorsal and anal rounded : second anal sjrine longest and strongest : caudal slightly rounded. 

 Colours — yellow, with a black ocular band which has a white edge : a black white-edged ocellus at the base of 

 the caudal fin. 



Habitat. — Andaman islands to the South seas ; the specimen figured is from the British Museum collection, 

 and is 4j inches in length. 



B. With three anal spines. 



2. Chsetodon xanthocephalus, Plate XXVI, fig. 4. 

 Bennett, Proc. Zool. Soc. ii, p. 182 ; Giinther, Catal. ii, p. 33. 

 B. vi, D. iflif, P. 15, V 1/5, A. A, C. 17, L. r. if, L. tr. 11/18. 



Length of head 4|, of caudal one sixth, height of body If in the total length. Eyes — diameter 1/4 of 

 length of head, 1| diameter from end of snout, and also apart. Preopercle indistinctly serrated. Fins — soft 

 portions of the dorsal and anal rounded. Colours — a small dark blotch above the orbit : body brownish-yellow, 

 with six indistinct dark vertical streaks : dorsal and anal fins dark violet, having white edges : caudal and 

 ventrals yellowish. 



Habitat. — Ceylon and Zanzibar, the figure and description are from the type specimen in the British Museum. 



3. ChEetodon falcula, Plate XXVI, fig. 5. 

 Bloch, ix, p. 102, t. 425, f. 2 ; Bl. Schn. p. 225 ; Cuv. and Val. vii, p. 41 ; Bleeker, Batoe, p. 311 ; 

 Giinther, Catal. ii, p. 17, and Fische d. Sudsee, p. 39, t. xxvii, f. C. 



Chcetodon ulietensis, Cuv. and Val. vii, p. 39 ; Bleeker, Amboina, p. 38 ; Giinther, Catal. ii, p. 18. 



B. vi, D. (^mr, P- 15, V. 1/5, A. T ^ TJ , C. 17, L. r. 28, L. tr. 6/12. 



Length of head 3J to one fourth, of caudal 6|, height of body If in the total length. Eyes — diameter 

 1/4 of length of head, nearly 2 diameters from the end of snout, and 1 apart. The maxfila reaches half way to 

 below the front edge of the orbit. Preopercle serrated along its vertical limb, but almost entire along its angle 

 and vertical edge. Teeth— brush-like. Fins — dorsal spines of moderate strength, the last being the longest, 

 the soft portion of the fin rounded : candal cut almost square : ventral reaching as far as the anal spines : 

 pectoral equal to the length of the head behind the angle of the mouth : second anal spine strongest and rather 

 the longest, being equal to the last of the dorsal fin. Colours — body and head of a rather red-lilac-purple, 

 beco min g of a primrose colour posteriorly, and also on the fins. A dark ocular band, narrower than the orbit, 

 commences a short distance anterior to the dorsal fin, and is continued through the eye on to the interopercle, it 

 has a white edge. A black band, widest above, arises from the first four or five dorsal spines, and is continued 

 to a short distance below the lateral-line :* a second angularly pointed in front, begins from the last three spines 

 and descends to the lateral-line : a third passes over a free portion of the tail. Twelve to fourteen vertical 

 narrow black bands pass down either side. Soft dorsal fin with a narrow black upper margin : caudal with a 

 black and white posterior edge : anal with a black intramarginal band having a white outer margin, and two 

 more superiorly parallel to it. 



Habitat. — Seas of India to the Malay Archipelago and beyond. The specimen figured was taken at the 

 Nicobars, the species attains to at least 8 inches in length. 



* A different distribution of colours is shown in Garrett's " Fische d. Sudsee," in which the body is lighter than described 

 above. The two dark vertical bands from the dorsal fin are conjoined superiorly and only extend forwards so far as the fourth dorsal 

 spine, but they descend lower than in my specimen. Likewise the band over the free portion of the tail is reduced to a blotch. The 

 body bands arc stated to have sometimes white edges. 



