10 TELEOSTEI. ACANTHOPTEEYGII. 



increasing in width to near posterior extremity of soft anal, the last 

 over the base of the caudal ; soft dorsal and anal with a dark outer 

 edge and light margin. 



Hal. Seas of India to the Malay Archipelago and beyond. 



739. (15.) Chaetodon ocellatns. 



Platax ocellatus, Cuv. $ Vol. H. N. Poiss. vii, p. 220. 



Cksetodon oligacanthus, Meeker, Batav. Genootsch. Verhand. xxiii, 



Chsetod. p. 16; Day, Fish. India, pp. 109, Suppl, p. 786 (see 



synon.). 



D. 6-7/29-30. P. 15. V. 1/5. A. 3/19-22. C. 17. L. 1. 46-48. 



Length of head 3| to 4, height of body 1| in the total length. 

 Eyes diameter 3% in length of head, 1 diam. from end of snout 

 and also apart. Both margins of preopercle serrated, the inferior 

 most coarsely so. Fins anterior portions of soft dorsal and anal 

 the highest. Lateral line ceases opposite posterior fourth of dorsal. 

 Colour yellowish white, with five vertical brown bands, the anterior 

 four of which have black edges ; the ocular is brown and narrower 

 than the orbit ; three more similar bands pass from the back to the 

 abdomen ; at the upper part of the last is a dark ocellus at the base 

 of the 8th to 12th dorsal rays inclusive ; the fifth band is over the 

 free portion of the tail. The posterior half of the ventrals is* some- 

 times black. 



Hub. Seas of India, the Malay Archipelago to the Philippine 

 Islands. 



2. Genus CHELMON, Cuv. 

 Syn. Prognathodus. 



Branchiostegals six or seven ; pseudobranchiao. Body elevated 

 and compressed. Snout produced as a long round tube by the 

 horizontal elongation of the premaxillaries and mandibles, which 

 are laterally connected by membrane ; the gape of the mouth 

 small. Preopercle without any spine : it and the preorbital some- 

 times serrated. Teeth on the jaws ; none on the palate. One 

 dorsal, with from 9 to 13 spines, none elongate ; anal with 3. 

 Scales of moderate or small size. 



Geographical Distribution. Indian and Pacific Oceans. 



Synopsis of Indian Species. 



A black triangular patch from the dorsal to the 



snout 1. C. longirostris, p. 10. 



Five orange Avhite-edged cross bands 2. (7. rostratus, p. 11. 



740. (1.) Chelmon longirostris. 



Chsetodon longirostris, Brouss. Ich. pi. 7. 



Chelnio longirostris, Day, Fish. India, p. 109 (see synon.). 



