312 GYMNODONTES. 



4. Chilomyctems orbicularis. 



■ Diodon orbicularis, Bl. tab. 127; Lacep.u.^.lQ; Bennett, miaUng 

 Vol/, ii. p. 204 ; Barnerille, Rev. Zuol. 1846, p. 141 ; Bleek. Nat. 

 Tyds. Ned. hid. -v. p. 92, or Act. Soc. Sc. Indo-Neerl. ii. Aniboiua, 

 viii. p. 95, or Atl. Ichthyol. Gymnod. p. 55, pi. 1. fig. 4. 



creruleus, Quoy (^ Gaim. Zuol. Urcm. I'oiss, p. 201, pi. 65. fig. 5 



(young-). 



triedi'icus, Cant. Mai. Fish. p. 371 (not Cuv.). 



Spines very strong, but rather short ; three above the orbit, and one 

 in the middle of the forehead. SuperciHary edges raised, convergent 

 towards the front. The roots of the spines are flat, depressed, the 

 anterior with a flattened keel. There are about nine transverse 

 series of spines between the snout and dorsal fin. Nostrils between 

 the frontal spine and the fore part of the superciliary edge. Tail 

 spineless ; but the roots of a single pair of spines reach across behind 

 the dorsal fin. Jaws feeble, horizontal, the upper obtusely pointed. 

 Tlie inner masticatory surface is smooth and concave. Brown, ir- 

 regularly clouded with darker, generally some round black spots on 

 the side. 



Indian Ocean and archipelago. 



a. Adult : skin (6 inches). Pinang. From Dr. Cantor's Collec- 



tion. 



b. Adult. Ccrani. Purchased of Mr. Stevens. 



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



tion. 



d. Half-grown : stuffed. Indian Ocean. Presented by Sir A. 



Smith. 

 c-li. Half-grown: stuffed. 



5. Chilomycteriis echinatus. 



Seha, iii. xxiii. fig. .3. 



Ostracion, sp., Artedi, Gen. p. 60. no. 18. 



Diodon atinga, var. y, L. Syst. Nat. i. p. 413. 



Cyclichtliys orbicularis, Kaiip, Wlegm. Arch. 1855, p. 2.31 (not BL). 



Holocanthus ecliinatus, Gronov. Syst. ed. Gray, p. 27. 



Spines short and rather feeble ; three above the orbit, and one in 

 the middle of the forehead. Superciliary edges not raised, conver- 

 gent towards the front. The roots of the spiues are feeble and com- 

 pressed into sharp ridges. There are about eleven transverse series 

 of spines between the snout and the dorsal fin. Nostrils between 

 the frontal spine and fore part of superciliary edge. Tail spineless ; 

 but the inner roots of a single pair of sjjines reach across behind 

 the dorsal fin. Jaws strong, the upper with a vertical anterior sur- 

 face and a median ridge. The inner masticatory surface is provided 

 with two or three transverse pads, divided by a median line. Sides 

 sometimes with round dark spots. 



Cape of Good Hope. 

 a-b. Adult (7 inches): skins. Cape. Presented by Sir A. Smith. 

 c-e. Adult : skins. 



