THE CRUSTACEA. 113 



pugnacious ; we are unacquainted with its enemies, but 

 have met with great numbers with the abdomen and all 

 the posterior parts eaten away. 



Pagurus ulidianus ? We name this species with some doubt, 

 having met with numerous specimens inhabiting the 

 shells of Natica monilifera, which have a strong 

 resemblance to the figure of this species in Bell's 

 " British Crustacea." 



Norway Lobster (Nephrops Norvegicus}. This beautiful 

 species is given on the authority of Mr. James Glover. 



Common Shrimp {Crangon vulgaris). 



Common Prawn {Pandalus annulicornis). Occasionally taken 

 by the shrimpers, but not common, and much smaller 

 than on the south coasts. 



Minute Porcelain Crab Porcellana longicornis}. This minute 

 species is often found on the sponge-like base of the 

 Lobster's-horn Coralline ; it is obtained from the size of 

 mustard seed to a quarter of an inch in diameter, and 

 varies in colour from a dull pale red to a brilliant scarlet, 

 intermixed with golden yellow. 



Mysis Chamceleon. A specimen was found in 1861. 



Pychnogonium littorale. A suctorial crustacean. J. G. 



