HALF AN HOUR WITH CRUSTACEA. 



255 



Fig. 140. 



It attains a length exceeding two inches, and is of 

 reddish-grey colour, marked with deep red. The 

 common name for it is the " Shore-prawn." Under- 

 neath the gill-covers both of 

 shrimps and prawns may often be 

 seen a parasitic crustacean (Bopy- 

 rus crangorum, Fig. 141), which 

 often causes a peculiar bulging of 

 the skin. 



In conclusion, we would notice 

 a group of crustaceans most abun- 

 dant in the rock-pools and along 



the Wet Sands of Our Coasts. One The Banded Shrimp 

 ,,_ , , -r^. (Crangon fasciatus). 



of these (Mysis chamseleon, figs. 



142, and 143) is very abundant, and takes its 



name from its varying tints and colours. Its 



Fig. 141. 



Bopyrus crangorum, x 10. Male and Female, 



length is generally over an inch, and its stalked 

 eyes show its relation to the shrimps. One very 



