210 SCLEHODEKMI. 



head, but as loug and longer in young ones. There is a consider- 

 able interval between the dorsal fins in adult examples, whilst they 

 are close together in young. Spinous dorsal with a black blotch. 

 East Indies, China, and Japan. 



a. Adult (11 inches long). North China. Purchased of Mr. Jam- 



rach. 

 h, c. Adult and young. China. 



d. Adult : skin. China. Presented by J. K. Reeves, Esq. 



e. Adult. Japan. Purchased of Mr. Jamrach. 



/. Half-grown. Formosa. Presented by Dr. Collingwood. 



g. Half-grown. Amboyna. Purchased of Hr. Frank. 



h. Adult. East-Indian archipelago. From Dr. Bleeker's Collection 

 as T. hrevirostris. 



■i. Half- grown. East-Indian archipelago. From Dr. Bleeker's Col- 

 lection as T. nieuliofii. 



l\ Half-grown. East-Indian archipelago. From Dr. Bleeker's Col- 

 lection. — Type of T. rhodopterus. 



I. Half-grown. East-Indian archipelago. 



m. Young. East-Indian arcliipelago. From Dr. Bleeker's Collection. 

 — Tyj^e of T. hracliysoma. 



n. Young. Madras. Presented by Capt. Mitchell. 



0, p, q, r, s, t. Adult, half-grown, and young. 



u. Adult : skeleton. Purchased. 



2. Triacanthus biaculeatus. 



Balistes biaculeatus, Bl. tab. 148. fig. 2. 



Triacanthus biaculeatus, Ctn\ Rt-()ne An. ; Cant. Mai. Fish. p. 360 ; 



? Daij, Fish. Malabar, p. 260. 

 oxycephalus, Bleck. Verh. Bat. Gen. xxiv. Balist. p. 27, tab. 



5. fig. 10, or Nat. Ti/ds. Ned. hid. ii. p. 496, or Atl. Ichfh. v. p. 90, 



Balist. pi. 6. fig. .3. " 

 blochii, Bleek. Nat. Ti/ds. Ned. Ltd. iii. p. 81, or Atl. Ichth. v. 



p. 89, Balist. pi. 3. tig. 1 ; Kner, Norara, Fische, p. 394. 



angustifrons, Hollard, Ann. Sc. Nat. 1864, i. p. 45, pi. 2. fig. 2. 



macrurus, Bleek. Atl. Ichth. v. p. 91, Balist. pi. 8. fig. 3. 



D. 5 I 22-25. A. 16-19. 



The height of the body is contained from twice and one-half to thrice 

 and one-fifth in the total length (without caudal). Snout produced, 

 with the upper profile distinctly concave. The first dorsal spine as 

 long as the head, and sometimes considerably longer ; the second 

 very short, not much longer than the third. Spinous dorsal fin 

 with or without black spot. 



East Indies ; Australia. 



a. Adult: skin. Pinang. From Dr. Cantor's Collection. 



h. Adult. Java. From Dr. Bleeker's Collection. — Type of T. ma- 



c. Adult. East-Indian archipelago. From Dr. Bleeker's Collec- 

 tion as T. blochii. 



