BY "W. MACLEAY, F.L.S. 343 



the root of the caudal fin. Snout short, obtuse, two-fifths or 

 more of the length of the head, and rather more than the width 

 of the inter-orbital space, which is flat or but slightly concave. 

 On each side two solid nasal tentacles without opening-. Length 

 of the caudal fin equal to its distance from the dorsal. Colour 

 of a greenish olive with very numerous bluish dots ; the 

 abdomen which is very large is beautifully marked with white 

 or yellow fascice ; fins yellow. 



Port Jackson. 



1058. Tetrodon amabilis, Casteln. 

 Proc. Linn. Soc. N.S. Wales, Vol. III., p. 401. 

 Port Jackson. 



Genus Diodox, L. 



Jaws without median suture. Body covered with dermal 

 ossifications, each with a pair of lateral roots, and with a stiff, 

 moveable, and erectile spine. Nasal tentacle simple, with a pair 

 of lateral openings. 



Tropical Seas. 



1059. Diodox hystrix, L. 



Bleek. Atl. Ichth. Gymnod., p. 56, pi. 3, fig. 2. — Gunth., Cat. 



Pishes, VIII., p. 306. 



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

 grooves ; the post-pectoral spines are the longest, about as long 

 as the pectoral fin, those of the posterior part of the back short 

 and broad. Prontal spines of medium size. The upper and 

 lower side of the tail with two or three pairs of immovable 

 spines. All the upper and lateral parts and the fins with 

 numerous small round black or brown spots. 



Port Jackson. (Castelnau.) 



