76 



PORTUNID.E. 



DECAPODA. 



RRACHYr r R.l 



COMMON SHORE-CRAB. HARBOUR-CRAB. 



Carcinus Manas. 



('<ni<-fr Manas, I'ENN. Brit. Zool. IV. p. 3. t. iii. f. o. 



Portimus LEACH, Edinb. Encycl. VII. p. 390. 



<'<n-cinm LEACH, Ib. p. 4'2D. Trans. Linn. Soc. XI. p. 314. Malac. 



Podophth. Brit. t. v. f. 14. EDW. Hist. Crust. I. p. 431. 



THR carapace of this common species is rather broader 

 than it is long-, minutely tuberculatcd, the regions very 

 distinct and rather prominent. The front is divided into 

 tlm>e lobes, of which the middle one is rather longer 

 than the others ; they are distinctly margined and slightly 

 turned upwards ; the orbits very open above, with a single 

 fissure in the superior, and one in the inferior margin, and 

 a strong tooth at the outer, and a smaller one at the 



