68 Proceedings. 



I saw one of the latter, whilst swimming in my aquarium, 

 drop right into the centre of an Anemone (Actinia mesemhnj- 

 anthemum), which immediately closed over him. I expected he 

 was killed, and was surprised after a short time to see the 

 Anemone opening again. The Crab lay as if dead till the 

 Anemone was quite open, then suddenly tried to swim out ; 

 but the Anemone was too sharp for him, and he was enclosed 

 again. This occurred severiil times, but at last the Crab lay 

 perfectly still till the Anemone turned him quite out. Thinking 

 that he was very much wanting to enter a Mussel, I procured 

 one next day, and had the pleasure of observing his method 

 of entering. He swam over the Mussel, then dropped on to 

 the portion of the Mussel protruding from the shell, and lay 

 as if dead. He then crawled towards the opening, but so 

 slowly that his movement was imperceptible. When near the 

 opening, he made a start forward, but the Mussel closed on 

 him, and squirted him across the aquarium, as a boy squirts 

 a cherry-stone from between his fingers. After several 

 attempts in this way, which, as far as I recollect, occupied 

 about two hours, he succeeded in getting in. 



Amongst the Sessile-eyed Crustacea are some of the most 

 grotesque forms in creation. The Caprellas throw themselves 

 into the most extraordinary attitudes, which are even more 

 curious and laughable than those of the Praying Mantis. 

 Some of this order are very careful of their young. One 

 Caprella carries her young on her back, and the Ganimarus 

 lucusta swims about surrounded by her young, who take refuge 

 under her body like chickens under a hen when in danger. 



The eyes of the Crustacea are compound, and resemble 

 those of insects ; and they vary in form and perfectness 

 according to the use they make of them. Thus the eye of 

 the common Edible Crab has 3000 facets, and that of the 

 Green Crab only 100. The Calimiassa, which burrows in the 

 sand, has only small eyes on the sides of the eye-stalks ; and 

 the eye of the Calocaris, which burrows in the mud often 180 

 fathoms under the sea, has no colouring-pigment, and no 

 cornea ; and one small Crustacean, which lives in deep wells, 

 has no eye at all, hut by careful dissection a spot is found under- 



