1^8 



CLASS CRUSTACEA. 



on footstalks; the head, instead of being distinct, appears 

 in a great measure drawn into the corslet. It has been 

 called the Sea Mantis, from its bearing some resemblance 

 to an insect of that name, on account of the singularly- 

 formed hooks with which two of its foot-jaws are armed. 



The species shown in the engraving is found in the 

 Indian Seas ; it is the largest of the genus. 



The shell with which these creatures are covered has 

 very little consistence, more resembling hardened skin 

 han shell. They frequent the sandy bottom of the sea. 



SauiUa maculata. 



There is a small species v.hich is found in fresh water, 

 in which the young, after the eggs are hatched, remain 

 for some time in shelter under the plates with which the 

 body of the mother is covered. 



The Common Cloportus, (Cloportus ascellvs.) 



This animal is very common upon old walls and under 

 stones. It is somewhat like the wood-louse, but more 



