BRITISH STALK-EYED CRUSTACEA. 11 



Other species of this genus seem to be widely distributed, 

 and are recorded from such localities as the Mediterranean, Bed 

 Sea, Australia, east and west coasts of East Indies, and South 

 America. 



As regards the British Isles, we have obtained Pilumnus 

 hirtellus from many localities of the south-western coasts, as well 

 as from the Channel Islands. Bell states that it appears from 

 Mr. Thompson's catalogue to be widely distributed on the coasts 

 of Ireland, but in small numbers. It is, however, elsewhere 

 recorded as common near Galway, and was washed up near 

 Dublin after severe gales. It is frequent at Plymouth. Prof. 

 Stalio gives it as occurring in the Adriatic Sea. 



Pirimela denticulata (Leach). 



The carapace of this rare species is roughly circular, being 

 nearly as long as it is broad; the anterior margin is much 

 denticulated, and the lower lateral margins converge towards the 

 posterior margin; the upper surface is decidedly convex, the 

 regions being well marked. The anterior pair of legs are equal in 

 size, carinated, and the fingers grooved and serrated on the inner 

 margins ; the remaining legs are somewhat flattened and slightly 

 fringed with hair on the edges. The abdomen is seven-jointed 

 in the female and five-jointed in the male. 



In size this beautiful little crab rarely exceeds an inch in 

 diameter of the carapace. Its colour varies somewhat, being 

 usually of a brownish tint, with occasionally a tinge of green. 



It is evidently one of our rarest species. Bell records a few 

 isolated cases of its capture on the coast near Sandwich, Bantham, 

 Torquay, and Compton, Isle of Wight, as well as from Scotland 

 and the Antrim coast. It has been recorded from St. Andrews 

 (rare), Galway (rare), Belfast, and South Devon. Mr. Norman 

 has obtained it at Guernsey and Herm in the pools accessible at 

 extreme low tide, where it had probably gone for exuviation. In 

 Cornwall it is sometimes found amongst trawlers' refuse. We 

 have received specimens from the Channel Isles, Sussex coast, 

 and Brixham. 



In the ' Natural History Review' (vol. iv. p. 156) Dr. Kinahan 

 gives an interesting account, with plate, of the zorea form of this 

 rare crustacean. 



