ECHINODERMATA. 95 



Orderly. Echinoidea. 



Fam. 1. Cidaridae. 

 Genus Echinus, L. 



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



Common amongst the tangles at extreme low water, and 

 in the laminarian region ; yomig specimens occur under 

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

 loaded with fragments of laminarian stalks, pieces of Delesseria, 

 and other seaweeds covered with Memhranipora ; in some 

 there are fragments of the shells of Balani and tubes of 

 Serpulw. 



Echinus miliar is, heske; Forbes, Brit. Starf. p. 161. 

 Not uncommon under stones in rock -pools. 



Echinus Flemingii, 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 tlie Channel Islands. 



Genus Toxopneustes, Agassiz. 



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

 Starf. p. 172 (as Echinus neglectus). 



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

 cimens are smaller than those from the Channel Islands. 



Fam. 2. Clypeastrldae. 

 Genus Echinocyamus, Leske. 



Echinocyamus angulosus, 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 tlie 

 East Rocks amongst the shell-gravel. 



