26 SQtJAMIPIITNES. 



forwards, those above the anal ascending obliquely forwards. The 

 dorsal with a narrow black margin, and a black band along the base 

 of the soft portion, posteriorly bent downwards, crossing the tail and 

 continued on a part of the anal. The anal with a narrow black and 

 white margin ; the caudal with two black cross-bands, the anterior 

 of which is crescent-shaped. 

 From the Red Sea to Polynesia. 



rt. Adult. Mauritius. From the Colleetion of C. Telfair, Esq. 



b. Adult : skeleton. Maimtius. From the Collection of C. Telfair, 



Esq. 



c, d. Fine specimens. Amboyna. Purchased of Mr. Frank. 

 e. Adult. From the Haslar Collection. 



Skeleton. — The configm-ation of the bones of the head is more 

 like that of Chcetodon strigangulus than that of Ch. meyeri. The 

 lower jaw is elongate and rather low, the dentary being somewhat 

 pointed ; the prseorbital is produced, and twice as long as high ; the 

 infraorbital ring, especially the posterior portion, is narrow, and the 

 latter is joined to the inner ridge of the prseoperculum. The in- 

 ferior limb of the praeoperculum is 1| as long as the posterior, which 

 ascends obliquely backwards ; the operciilum is subquadrangnlar, 

 twice as high as wide, with the posterior side slightly emarginate ; 

 the suboperculum narrow, tapering posteriorly ; the interoperculum 

 oblong, iiTegularly quadrangiilar. The occipital crest is exceedingly 

 high, and forked at its upper extremity, as described in Ch. meyen. 

 The length of the abdominal portion of the vertebral column is to 

 that of the caudal as 1 : 1*3. The hoemal spines of the first and 

 second caudal vertebrae are anchylosed together ; the first and second 

 interhtemals are separated. Epipleural spines none. There is a 

 roimd foramen between the radius and coracoid, near the symphysis 

 of the coracoids. 



42. Chaetodon guttatissimus. 



Bennett, Proc. Comm. Zool. Soc. ii. p. 183. 



D. |. A. ^. L. lat. 32. 



The snout is slightly produced, and rather longer than the dia- 

 meter of the eye ; pi'seoperculum serrated ; the dorsal and anal fins 

 rounded posteriorly. The ocular band extends from the nape of the 

 neck to the lower margin of the interoperculum; it is narrower 

 than the eye above, and much narrower below the orbit ; the upper 

 portion is edged with yellow. Sides of the body yellow, each scale 

 with a black spot ; dorsal and anal pui-plish-brown, dotted with 

 black and edged with yello-^dsh ; caudal with a black crescent across 

 the middle ; ventrals yellowish. 



Sea of Ceylon. 



rt. Adult. Ceylon. From Dr. Sibbald's Collection. — Type of the 



species. 

 6. Adult : skin. Ceylon. From Dr. E. F. Kelaart's Collection. 



