70 THE ZOOLOGIST. 



it abundantly from the Channel Islands, Devon, Dorset and 

 Cornwall coasts, as well as from the Fame Islands. It has also 

 been recorded from several parts of the Irish coast, as well as 

 from the French coast and the Mediterranean. It seems, how- 

 ever, from what we have gathered, that its development is more 

 favoured in a northern than in a southern locality, specimens 

 from the north being generally larger and finer than those from 

 the Mediterranean ; this rather curious fact obtains with some 

 other species. 



Being a shore crab it is easily obtained at low tide by 

 searching carefully the under surfaces of large rugged stones. 

 In the young state, final stage, this is a beautiful and instructive 

 object for the microscope, the remarkable setae covering the 

 animal exhibiting most curious structure. 



Porcellana longicornis, Edw. 



This species, though resembling the last-named in general 

 form, is so distinct in its specific features that a description is 

 necessary. 



The carapace is nearly round in form, and the three anterior 

 projections are very small, the middle one being slightly grooved ; 

 the antenna are very long, whence the specific name of the animal. 

 The anterior pair of legs are large and heavy, in comparison to 

 the size of the owner, the carapace seldom reaching three-eighths 

 of an inch in diameter ; they are ribbed longitudinally and armed 

 with powerful forceps ; they are also unequal in size, which is not 

 the case with P. platycheles. The next three pairs of legs are 

 simple and hooked at the tips, and the last pair are rudi- 

 mentary. 



P. longicornis is not hairy, like the former species ; it also 

 differs widely from it in colour, being generally of a dull reddish 

 tint, but often of a bright red, beautifully marked with brown or 

 white, some that we obtained from the outer Fame Islands 

 having a most brilliant combination of tints. It seems to 

 be often taken in company with the last species, though it 

 is more frequently found in rather deeper water ; its range, 

 however, appears to be pretty much the same as that of P. 

 platycheles. 



In Jersey we were much struck on observing that, whilst 

 P. platycheles was invariably found on rugged, overgrown, or 



