302 GYMNODONTES. 



snout nearly straight. Only the hindmost part of the sides of the 

 tail is spineless. 



Indian Ocean and archipelago. 



a. Half-grown. Zanzibar. Presented by Lieut.-Col. Playfair. 



b. Half-grown. East-Indian archipelago. From Dr. Bleeker's 



Collection. — One of the typical specimens. 



c. Adult : skin in spirits. 



50. Tetrodon janthinopterus. 



Tropidichthys s. Anosmius s. Psilonotus s. Canthogaster janthino- 

 pterus, ^/eeA. Nat. Tyds, Ned, Ind. viii. p. 429; Atl. Ichth. Gymnod. 

 p. 82; pi. 9. fig. 2. 



A black ocellus on each side of the base of the dorsal fin. Sides 

 of the body and tail with nunjerous round whitish spots larger tnan 

 the pupil, and separated from one another merely by a network of 

 the brown ground-colour. Sides of the head with scarcely any spots, 

 but some bluish horizontal lines cross the eye. Back and caudal fin 

 not spotted. Upper profile of the snout nearly straight. Only the 

 free portion of the tail is spineless. 



Celebes and Amboyna. 



a. One of the typical specimens. From Dr. Bleeker's Collection. 



51. Tetrodon pnnctatissiiuTis. 



Scarcely distinct from T. janthinopterus. 



No black dorsal spot. The entire body, forwards to the posterior 

 parts of the head, covered with numerous round whitish spots, smaller 

 than or as large as the pupil, and separated from one another 

 merely by a network of the brown ground-colour. Scarcely a trace 

 of lines crossing the eye. Fins not spotted. Upper profile of the 

 snout slightly concave. Tail and hind part of the trunk spineless. 

 D. 9. 



Pacific coast of Panama. 



a. Several specimens, 2| inches long. Panama. From Capt. Dow's 



Collection. 

 h. Three inches long. South America. Purchased of Mr. Cuming. 



52. Tetrodon amboinensis. 



Psilonotus amboinensis, Bleek. Ned. Tyds. Dierk. ii. p. 180; Atl. Ichth. 



Gymnod. tab. 9. fig. 7. 

 Canthogaster amboinensis, Bleek. Atl. Ichth. Gymnod. p. 79. 



Dorsal spot none. Body with numerous, hut rather distant, round 

 or ovate white spots about as large as the pupil, between which black 

 spots similar hi size and form are interspersed. They do not extend 

 on the caudal fin, or only on its basal half. Dorsal fin with 11 or 

 12 rays. 



Indian Ocean and archipelago. 



Var. amboinensis. The sides of the head in front of the pectoral 



