O. MONACANTHTJS. 



253 



profile concave. Dorsal sjuno very feeble, above the middle of the 

 orbit. Part of the gill-opening in advance of, pectoral tin lielow, 

 the orbit. Caudal fin elongate, nearly as long as or longer than the 

 head, rounded ; dorsal and anal fins low. Ventral spine none. 

 Head and body with irregular blue spots and lines, and small round 

 black spots. 



Vert. 7/14. 



Tropical and subtropical seas. 

 a. Adult. 

 Lowe. 



stuffed. West Indies. Purchased of 



Cape Verde Islands. Presented by the Rev. II. T. 



h-c. 



Adult, 26 inches long 

 Mr. Scrivener. 



d. Adult: skin. Jamaica. 



e. Young. South America. 

 /. Half-grown. Zanzibar. 



tion. 

 f/. Half-grown : skin. Zanzibar. 



lection. 

 h. Young : skin. Pinang. From Dr. Cantor's Collection. 

 Amboyna. Purchased of Hr. Frank. 

 Siam. Purchased of Mr. Jamrach. 

 Adult, half-grown, and young, 

 stuffed, 

 skeleton. Cape Verde Islands. Presented by the llev 



Purchased of Mr. Parnell. 

 From Lieut.-Col. Playfair's Collec- 

 From Lieut. -Col. Playfair's Col- 



i. Y''oung. 

 /i-. Young. 

 /, m, n-p. 

 q. Adult : 

 r. Adult: 



R. T. Lowe. 



Balistes littiros^is, Shaw, Gener. Zool. v. p. 405, is described thus : 

 — Length nearly two feet : habit long and slender : colour jet-black, 

 with numerous, abrupt, blue streaks in an obliquely longitudinal 

 direction : fins and tail white ; a blue bar across the latter ; under 

 jaw longer than the upper : over the eyes a very long, slender, black 

 spine : along each side of the head, from the eyes to the mouth, a 

 narrow white stripe : eyes yellow. Native of the Indian seas : ob- 

 served about the coasts of Otaheitee by Captain G. Tobin. 



38. Monacanthus personatus. 



Aluteres personatus, Less. Voy. Coq. Zool. ii. p. 105 ; Bleek. Ned. 

 Tyds. Dierk. 1865, iii. p. 29. 



D. 46. A. 48-50. 



Skin finely velvety. Body oblong, its depth being less than one- 

 half of the total length, without caudal, which is one-third of the 

 total length. Snout pointed, with the upper profile concave. Dorsal 

 spine above the orbit. Ventral spine none. Head black ; mouth 

 light greyish. A long blackish blotch on the back ; another, 

 rounded, near the caudal fin, and two larger oblique spots on the 

 sides. Caudal fin black with white stripes. (Less.) 



New Guinea. 



Length of specimen 6 inches, of caudal fin 2 inches. 



