1. CHJETODON, 11 



e. Young. China Seas. Presented by Captain Sir E. Belcher. 

 /, g. Adult : stuffed. Purchased. 

 h. Half-grown : stuffed. 



bb. A round black or white spot on each side of the body. 

 15. Chaetodon tallii. 

 Sleeker, Banda, iii. p. 97. 



D. |. A. ^. L. lat 25. 



The snout is pointed ; the praeoperculum not denticulated ; the 

 dorsal and anal fins rounded posteriorly. The ocular band is as 

 wide as the orbit, extends from the origin of the dorsal to the throat, 

 and is edged with white. Body with obHque blackish transverse 

 stripes ; on each side of the back, below the anterior half of the sofl 

 dorsal, a blackish blotch ; tail with a broad blaclcish cross-band ; 

 dorsal with a narrow black margin ; ventrals and caudal transparent 

 violet. {Bl.) 



Sea of Banda Neira. 



16. ChaBtodon unimaculatus. 



Block, t. 201. f. 1; Bl. Schn. p. 221; Cuv. fy Val vii. p. 72; Cuv. 

 It^gne A7iim. Ul.Poiss. pi. 39. f. 3 (not good); Bleek. Banda, i. p. 241. 



D.g. A.^. L. lat. 46. L. trans v. 8/19. Vert. 10/14. 



The snout is very slightly produced, and rather longer than the 

 diameter of the eye ; praeoperculum not denticulated ; the dorsal 

 and anal fins rounded posteriorly. The black ocular band is con- 

 tinued over the chest, and as broad as the diameter of the eye ; a 

 narrower vertical band over the posterior margins of the dorsal and 

 anal, and across the tail; a large round black spot on the lateral 

 line, below the six posterior spines ; the remainder of the body ana 

 the fins uniform. 



Molucca Sea ; Polynesia. 



a. Fine specimen. Amboyna. Purchased of Mr. Frank. 

 h. Adult : skeleton. Amboyna. Purchased of Mr. Frank. 

 c. Adult : bleached. Old Collection. 



The skeleton differs from that of Oh. strigangulns in the following 

 points : — The bones are more elongate in the vertical direction ; the 

 length of the lower limb of the praeoperculiim is nearly one-half that 

 of the posterior ; the operculum is three times as high as wide. The 

 cavity for the pectoral muscles is rather shallow, but very broad. The 

 interior of the three lamellae of the pubic bones is the most developed, 

 the inferior the least, but posteriorly with a swelling for the articula- 

 tion of the ventral spine. The length of the abdominal portion of the 

 vertebral column is very little less than that of the caudal ; the first 

 interhaemal is very long, as long as the first seven vertebrae together. 



