76 



PORTUNID^. 



DEC APOD A. 



DRACHYURA. 



PORTUNIDM. 



COMMON SHORE-CRAB. HARBOUR-CRAB. 



Carcinus Manas. 



Cancer Manas, Penn. Brit. Zool. IV. p. 3. t. iii. f. 5. 



Portu7ius „ Leach, Edinb. Encycl. VII. p. 390. 



Carcinus „ Leach, lb. p. 429. Trans. Linn. Soc. XI. p. 314. Make. 



Podophth. Brit. t. v. f. 1—4. Edw. Hist. Crust. I. p. 434. 



The caiajiace of this common species is rather broader 

 than it is long, minutely tuberculated, the regions very 

 distinct and rather prominent. The front is divided into 

 three 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 



