306 G\-MNODONTES. 



4. DIODON. 



Ostracion, sp., Artedi. 

 Diodon, sp., L., Cuv. 

 Paradiodou, Bleek. 



Jaws without median siiture. Body covered with dermal ossifi- 

 cations, each with a jiair of lateral roots and with a stiff, moveable, 

 and erectile spine. Nasal tentacle simple, with a pair of lateral 

 openings. 



tSeas between the tropics, extending to the Cape of Good Hope. 



1. Diodon kystrix. 



Histrix piscis, C/u-mfs, Exot. vi. c. 23 ; Jondon, Hist. Nat. Pise. tab. 



45. fig. 4 ; Willvr/hby, Hist. Pise. tab. J 5. 

 Reversus indicus, ^Wroy. Pise. iii. p. 113, tab. 15. fig. 12; Jomtmi, 



I. c. tab. 3. fig. 1. 

 Valent. Amb. p. 458, iig. 357 ; Eenard, i. p. 9, tab. 5. fig. 32. 

 Ostracion, sp., Artedi, Gen. p. 60. no. 19 ; Synon. p. 80. no. 21 ; 



Gronov. Mus. ii. p. 40. no. 181, and Zoophyl. p. 47. no. 181. 

 Seha, iii. p. 58, tab. 23. figs. 1 & 2, and p. m, tab. 24. fig. 10. 

 Crayracion, sp., Klein, Pise. Miss. iii. p. 20. noa. 13 & 14. 

 Erizo, Parra, p. 60, tab. 29. fig. 1. 

 Diodon hystrix, L. Syst. Nut. i. p. 413 ; Bris. Barncv. Rev. Zool. 1846, 



p. 141. 

 atinga, BI. tab. 125; Bl. Selin. p. 511; Laeep. ii. pp. 1 & 3; i. 



p]. 25. fig. 3 ; Eanj), JVieym. Areh. 1855, p. 227 (not L.). 



plumieri, Laeep. ii. pp. 2 & 10, i. pi. 3. fig. 3. 



brachiatiis, Bl. Schn. p. 513. 



pimctatus, Cuv. I. c. p. 132 ; Bleek. Verh. Bat. Gen. xxiv. 



Blootk. p. 19. 

 Ilolocanthus bj-strix, Grimor. Sy.st. ed. Gray, p. 27. 

 Paradiodon hystrix, Bleek. Atl. Ichth. Gymnod. p. 56, pi. 3. fig. 2. 



Spines strong, dilated at the base, and with a pair of basal grooves ; 

 the postpectoral spines are the longest, about as long as the pectoral 

 fin, those of the posterior part of the baclv short and broad. Frontal 

 spines of medium size. The upper and lower side of the tail with two 

 or three pairs of immoveable spines. AU tlie upper and lateral parts 

 and the fins with numerous small round blaclv or brown spots. 



Tropical parts of the Atlantic ; Indian Ocean and archipelago ; 

 Pacific. 



a. Twenty-four inches long. Gaboon. Purchased. 

 h-c. Large specimens : stuffed. Fernando Po. 

 d. Half-grown : stuffed. C'alabar. Presented by — Nimmo, Esq. 

 ('. Large'spccimen : stuffed. West Indies. 

 f-i. Adult and half-grown. Jamaica. 

 'k. Half-grown. Jamaica. Purchased of Mr. Higgins. 

 I. Half-grown : stufied. Cape Seas. 

 »H. Half-grown. Amboyua. Purchased of Hr. Frank. 

 n. Adult : stuffed. Indian Ocean. Purchased. 

 0. Young. Society Islands. Old Collection. 

 J). Thirty inches long : stuffed. Presented by S. Blackall, Esq. 

 q-v. Adult and young : stuffed. 



