THE CRUSTACEA 



149 



crab. There are some other points of similarity, but these 

 will be sufficient for our purpose. 



The common species on our coast is Galathea squamifera. 

 The male is about three inches long by one broad. The 

 claws are long and flat, and beautifully decorated with 

 tubercles and sharp spines. The female is shorter and 

 broader, and the claws 

 are less developed. 



The shell is highly 

 polished, and ridged trans- 

 versely, as we have seen. 

 The colour is a dark 

 brown. 



It is tolerably common 

 under stones at low- tide 

 level in rocky places. 



Galathea strigosa is a 

 gorgeous crustacean, much 

 larger than the last, being 

 about five inches long and 

 about one arid a half 

 wide. Its colour is bright 

 red, and the transverse 

 grooves deep blue. 



This is found in the 

 localities as the 



Fig. 60. Porcellaua platycheles 

 Natural size 



same 



last, but only rarely, as it really belongs to deep water. 

 It is not infrequently taken in the traps set to catch 

 prawns. 



Other species are Galathea media and Galathea nexa. 

 These are small, and found only in deep water. 



The next division of the Anomoura is the Porcellanidce (or 

 "Porcelain Crabs"). The most familiar example is Por- 

 cellana platycheles (or " Broad Claw " Fig. 60). This is 

 very abundant under stones from near high- water mark 



