GYMNODONTES. 163 



2. Tetrodon cutcutia. 



Hab. Coasts and rivers. 4 inches. 



Body smooth. Green above, sides with a network 

 of brownish lines. A large black spot edged with 

 white is nsnally present on the side in advance of the 

 dorsal fin. 



Dorsal 12. Pectoral 21. Anal 11. Candal 8. 



3. Tetrodon fluviatilis. 



Hab. Coast and fresh waters. 6 or 7 inches. 



Char. Body apparently smooth, but the head, back, 

 and belly are armed with small prickles, which can be 

 retracted beneath the skin. 



Upper parts greenish with irregular roundish dark 

 blotches, lower parts uniform whitish or dark 

 coloured. 



Dorsal 16. Pectoral 17. Anal 14. Caudal 8. 



M 



