NIK A EDULIS. 



Ill 



DEC APOD A. 



MACROURA. 



ALPHEADM. 



Nika eduUs. Risso. 



specific Character. — Didactyle hand longer than the wrist ; both straight. Cen- 

 tral plate of the tail longitudinally channelled. 



Ni]{a edulis. 



Processa canaliculata, 



„ edulis, 

 Nika canaliculata. 



RiSSO, Crust, de Nice, p. 85, t. iii. f. 3. — Hist. Nat. de 



I'Eiir. Merid. V. p. 72. — Roux, Crust, de la Medit. 



t. xlv. — Lam. Hist, des Anim. sans Vert. V. p. 203. 



— Desmar. Consider, sur les Crust, p. 230. — Edw. 



Hist, des Crust. II. p. 364. 

 Leach, Malac. Brit. t. xli. 

 Latr. Reg. Anim. de Cuv. (ed. 2nd) IV. p. dB. 

 Desmar Consid. sur les Crust, t. xxxix. f. 4. 



The whole of the carapace and abdomen of this species 

 is even and glabrous ; the carapace evenly rounded, some- 

 what compressed, terminating in a short, pointed, slightly 

 carinated rostrum ; a short acute point above the outer 

 edge of the orbit. Plate of the external antennse of almost 

 equal breadth throughout its length ; obliquely truncated at 



