PISA TETRAODON 
Tab. XX. 
P. testa lateribus utrinque 6-spinosis; spinis duabus minoribus ; quatuor majoribus. 
Cancer tetraodon. Penn. Brit. Zool. iv. 7. tab. \\u. fig. 15. 
Maja tetraodon. Bose, Hist. Nat. des Crust. 1. 254. 
Leach, Edinb. Encycl. vii. 39 5- 
Blastus tetraodon. vii. 431. 
Pisa tetraodon. Leach Trans. Linn. Soc. xi. 328. 
— Encycl. Britan. Suppl. i. 415. 
Cig 1 . I* Pisa tetraodon mas. 2. maris abdomen. 3. fcemina. 
Antenna. 6. Pedipalpus externus. 
4. fcemin/e abdomen. 
This animal inhabits deep water on the coasts of the Isle of Wight, Brighton 
mouth. It is often thrown on the shore after storms. 
The arms of the young males are scarcely thicker than those of the adult female. 
and Teig 
