COMMON PEA-CRAB. 



121 



DEC APOD A. 



BRACHYURA. 



PINNO THERJDJE. 



.-*"^^ 



1 Pinnotheres Latreillii. Leach. 

 3 Pinnotheres Pisiim. Leach. 



2 Pinnotheres varians. Leach. 

 4 Pinnotheres Cranchii. Leach. 



COMMON PEA-CRAB. 



Pinnotheres Pisum. 



Specific character, — Front of the male projecting ; carapace of the female uni- 

 formly rounded at the anterior margin ; abdomen in the latter sex broader than 

 it is long. 



Cancer Pisum, 

 Pinnniheri>s Pisum, 



Cranchii, 

 Latreillii, 



Pennant, Brit. Zool. IV. t. i. f. i. p. i. Herbst, 

 L p. 95, t. 2, f. 21. Fabr. Suppl. Ent. .343. 



Latr. Hist. Nat. des Crust. VL p. 83. Leach, 

 Mai. Brit. t. xiv. f. 2, .% (fem.) Edwards, 

 Hist. Nat. dos Crust. II. p. 31. 



Leach, 1. c. fig. 4, 5, (fem.) 



Leach, 1. c. f. 6, 7, 8, (mas immat. ?) 



Leach, 1. c. f. 9, 10, 11. (mas.) 



The sexes in all the species of this genus differ so re- 

 markably, that a separate description is necessary. 



Male. (Figs. 1 and 2.) The carapace is nearly orbicu- 



