58 CRUSTACEA OBSERVED IN PURBECK. 



Hyas araneus. Bell, 81. 



Frequent in the spring, and as much covered with small 

 fuci, as the preceding species. 



Hyas coarctatus. Bell, 35. 



On Peveril ledges at spring tides, June ; again in the 

 fall keer-di'edging in Swanage bay. 



* Spinous Spider-Crab. Maia squinado. Bell, 39. 



" Common off Swanage, on the lobster ground, I have 

 seen several. (JRev. J. M. Colson.) 



* , ^ , . Euryome aspera. Bell, 46. 

 Taken by Professor Bell in Swanage bay. 



Gfeat Crab. Cancer Pagurus. Bell, 59. 



The Crab par excellence of the market. Common. 



* . . . . Pilumnus hirtellus. Bell, 68. 

 Dredged by Professor Bell in Swanage bay. 



Common Shore-Crab. Carcinas mcenas. Bell, 76. 

 The most common species close along the shore. 



Portumnus variegatus. Bell, 85. 



One specimen in the keer-dredge on 24th October, and 

 since then one or two more ; but certainly not as Dr. 

 Leach observes "one of the most common." 



* Velvet Swimming Crab. Portunus puber. Bell, 90. 



Swanage bay, but not common. 



Arched-fronted Swimming-Crab. Portunus arcuatus, 

 BeU, 97. 



The most common species in six or seven fathoms water, 

 as the Shore-Crab is in shallower water. 



Cleanser Swimming-Crab, Portunus depurator. Bell, 

 101. 



Swanage and Studland bays. 



1 All the Swimming-Crabs are locally called " Fiddlers," from the 

 peculiar movement of their hinder legs. 



