MARINE BIOLOGICAL STATION AT PORT ERIN. 



105 



have 10 large or conspicuous legs or claws, 5 on each side 

 of the body. There are also about 14 other pairs of much 

 smaller legs, jaws and feelers which are not so con- 

 spicuous. 



Figure 'XV. shows (2) the common shrimp (Crangon 

 vulgaris) and (1) one of our common prawns (Pandalus 

 annulicornis). Shrimps are nocturnal animals, lying for 



Fig. XV., Prawn and Shrimp (natural size). 



the most part during the day buried in sand with only 

 the tips of the stalked eyes and the long delicate feelers 

 projecting above the surface. Prawns, on the other 

 hand, are active during the day, prowling about con- 

 stantly in search of food. They live amongst rocks and 

 sea-weed. While alive their bodies are transparent or 

 pale green, usually beautifully marked with blue, and 



