ECHINODERMATA. 95 



Order IV. Echinoidea. 



Fam. 1. Cidaridae. 



Genus Echinus, L. 



Echinus esculentus, L. ; Forbes, Brit. Starfishes, p. 149. 



Common amongst the tangles at extreme low water, and 



in the laminarian region; young specimens occur under 



stones between tide-marks. In many the intestinal canal is 



loaded with fragments of laminarian stalks, pieces of Delesseriu, 



and other seaweeds covered with Membranipora ; in some 



there are fragments of the shells of Balani and tubes of 



Serpulce, 



Echinus miliaris, Leske ; Forbes, Brit. Starf. p. 161. 

 Not uncommon under stones in rock-pools. 



Eckimis Flenmigii, Ball ; Forbes, Brit. Starf. p. 164. 

 Occasionally in deep water off the bay, and thrown on the 

 West Sands after storms. The specimens are much less than 

 those of the Channel Islands. 



Genus Toxopneustes, Agassiz. 



Toxopneustes drobachiensis, O. F. Miiller ; Forbes, Brit. 



Starf. p. 172 (as Echinus neghctus). 

 Not uncommon on the West Sands after storms. The spe- 

 cimens are smaller than those from the Channel Islands. 



Fam. 2. Clypeastridae. 

 Genus Echinocyamtjs, Leske. 



Echinocyamus anguhsus, Leske ; Forbes, Brit. Starf 

 p. 175. 



Abundant in deep water and in the stomachs of the cod, 

 flounder, and haddock. Worn specimens also occur at the 

 East Rocks amongst the shell-gravel. 



