273 



CHAP. XIX. 



ARTICULATA LOBSTERS, ETC. 



The Shrimp. The Common Lobster. Various Species. 

 Structure and Habits, &c. 



WE are now to look at another order of crusta- 

 ceans in which the prolongation of the animal's 

 body into a tail distinguishes it from all the 

 various species of crabs. Our rock pool which has 

 already afforded us specimens of other crustaceans 

 also contains a few shrimps, one of the most fami- 

 liar examples of the order referred to. There 

 are, "however, a large number of species included 

 in the order to which the lobster belongs, but it 

 is, of course, impossible to mention more than a 

 very few of the most familiar. 



The shrimp (Crangon vulgaris) is a well- 

 known inhabitant of our sea-shores, frequenting 

 some sandy beaches in vast multitudes. The 

 prawn (Palcemon serratus), which is a shrimp of 

 large size differing in some minute particulars 

 from the common shrimp, is likewise found on 

 many of our shores among loose stones, and what 

 is remarkable it is sometimes taken at sea on the 

 surface of the water when there has been a depth 

 of more than thirty fathoms. 



The young of the shrimp or prawn are often 

 T 



