COMMON PEA-CRAIf. 



121 



DEC APOD A. 

 BRACHYURA. 



PINNO THERIDsE. 



1 Pinnotheres Latreillii. Leach. 

 3 Pinnotheres Pisum. 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, 

 Pinnotheres Pisum, 



Cranchii, 

 Lutreillii, 

 varians, 



PENNANT, Brit. Zool. IV. t. i. f. i. p. i. HERBST, 

 I. p. 95, t. 2, f. 21. FABR. Suppl. Ent. 343. 



LATR. Hist. Nat. des Crust. VI. p. 83. LEACH, 

 Mai. Brit. t. xiv. f. 2, 3, (fern.) EDWARDS, 

 Hist. Nat. des Crust. II. p. 31. 



LEACH, 1. c. fig. 4, 5, (fern.) 



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- 



