PISA GIBBSIL. 
Tap. XIX. 
P. rostro deseendente ; testa spina utrinque pone oculos; brachiis femoribusque inermibus. 
Cancer biaculeatus. Montagu Trans. Linn. Soc. XI. 2. t. 1. f. 2. 
Pisa biaculeata. Leach Edinb. Encycl. VU. 431. 
Pisa Gibbsii. Leach Trans. Linn. Soc. XI. 327. 
Fig. 1, mas. 2, pedipalpus gem. extern. 3, maris abdomen. 4, femine abdomen. 
Pisa Gibbsii is not an uncommon species on the Southern coasts of Devon and Cornwall ; it 
mhabits deep water, and is taken by the Trawl net. 
It was first noticed by Mr. Gibbs, employed by Montagu, and is named after that in- 
defatigable and successful collector, by whom the British Fauna has been considerably enriched. 
The shell, when the hair is removed, is whitish and covered with impressed punctures. 
