I1YAS ARANEUS. 



31 



DECAPOD A. 



MAT ADM. 



Hyas araneus. 



Specific character. Carapace not contracted behind the post-orbitai 1 hastiform 

 process. 



Cancer araneus, 



Bufo, 

 Inachus araneus, 

 Maw, ,, 



Hyas 



LINN. Sjst. Nat. I. 1044. 

 MEREST, 1. 1. xvii. f. 59. p. 342. 

 FABR. Ent. Syst. Suppl. 356. 

 LEACH, Edinb. Encycl. VII. 394. 



Id. 1. c. p. 431. Id. Malac. Brit. t. xxi. A. EDW. Hist. 

 Crust. I. p. 312. COUCH, Cornish Fauna, p. 66. 



THIS is the largest British species of the family with the 

 exception ofMaia fiquinado. The carapace is of an elongate- 

 triangular form, the posterior margin very much rounded, 

 and the anterior portion considerably narrowed. The ros- 

 trum is triangular, its two lacinite nearly parallel at their 



