3. TETBODON. 283 



k. Young. Jamaica. Purchasod of Mr. Parnell. 



I. Adult. Dominica. Purchased of Mr. Cutter. 



m. Adult (10 inches). St. Croix. Purchased of Mr. Stevens. 



n. Adult. Puerto Cabello. Purchased of Hr. Brandt. 



0. Half-grown. British Guiana. Purchased of Mr. Leadbeater. 



p. Half-grown. Brazils. Presented hj' Lord Stuart. 



q, r-s, t-u. Adult and half-grown. Bahia. 



V, w-x, y-n. Adult, half-grown, and young. From the Zoological 



Society's Collection. 

 /3. Adult : stuffed. 



y, Z. Half-gro^vTi and young. South America. 

 €, C- Adult : skeletons. 



17. Tetrodon heraldi. 



Anchisomus geometricus, {Kaup) liichards. Voy. Herald, Zoul. p. 15G, 



pi. 30 (not Bl. Schn.). 

 Tetrodon geometricus, Giinth. Trans. Zool. Hoc. vi. 1808, p. 489. 



Scarcely distinct from T. testudineus. 



Minute spines cover the back from the intcrorbital space to near 

 the dorsal fin, and the abdomen from the throat to the vent, the 

 dorsal and abdominal spiny patches being connected by a transverse 

 stripe of spines behind the pectoral fin, the snout, sides, and tail 

 being naked. Snout rather obtuse, the eye being nearer to the end of 

 the snout than to the gill-opening (in the adult). Distance of the 

 nostril from the eye not much less than the diameter of the latter. 

 Intcrorbital space flat and broad. The diameter of the eye is two- 

 thirds of the width between the bony orbital edges. Length of the 

 caudal fin equal to its distance from the dorsal fin. Brownish 

 above, dotted with black and with whitish lines, the anterior of 

 which are transverse (on the head and nape) ; one or two white 

 concentric circles in front of the dorsal ; the inner circle connected 

 with the last transverse lino by a median li:ie. Abdomen and fins 

 immaculate ; caudal fiii blackish in its outer half. The young ex- 

 ample wants the black dots on the back. 



Vertebra} 8/10. 



Eastern Pacific. 



a. Advdt. Galapagos Islands. Presented by Sir J. Richardson. — 



Type of the species. 



b. Young. Panama. From Mr. Salviu's Collection. 



Tetrodon annulatus, Jenyns, Zool. Beagle, p. 153, from the Gala- 

 pagos Islands, may prove to be identical with this species. Jenyns 

 describes the intcrorbital space as " a little hollowed out ;" but I 

 find it quite flat in the typical example of T. heraldi. 



18. Tetrodon formosus. 



Minute spines cover the back from the intcrorbital space to near 

 the dorsal tin, and the abdomen from the throat to the vent, the 

 dorsal and abdominal spiny patches being connected by a transverse 



