334 Proceedings of the Royal Physical Society. 



AsTERiAS RUBENS, Linneeus. 



TJraster rubens, Forbes, Brit. Starf, 



Abundant between tide marks and in shallow water. 

 AsTERiAS viOLACEA, 0, F. MuUer, 



Uraster violacea, Forbes, Brit, Starf, 



Common in shallow water with A. ruhens, 



ASTERIAS HISPIDA, Pennant.^ 



Uraster Mspida, Forbes, Brit. Starf. 



Kyles of Bute, under stones on the shore (Forbes). Cum- 

 brae at low water, rare (David Kobertson), 



Order IV.— ECHINOIDEA, 



Echinus esculentus, Linn, 



Echinus sphaera, Forbes, Brit. Starf. 



Abundant between tide marks, and in the Laminarian and 

 Coralline zones. 



Echinus miliaris, P. L. S. MUller. 



Common, from tide marks to the Coralline zone. Small 

 specimens are often found nestling in empty bivalve shells. 

 Always in shallow water. 



Brissopsis lyrifera (Forbes), A. Agassiz, 



Brissus lyrifer, Forbes, Brit. Starf. 



Not uncommon in mud, 15-60 fathoms. Between Cum- 

 brae and Fairlie, Off south end of Bute, Kilchattan Bay. 

 Off Portincross Point, 25 fathoms. Off Garnock Beacon, 35 

 fathoms. Off Skate Island, Loch Fyne, 105 fathoms. Kil- 

 brennan Sound, 75-80 fathoms. Off Brodick Bay, 91-93 

 fathoms, " It inhabits mud at the depth of from ten to 

 fifteen fathoms in various localities in the estuary of the 



1 " I am not at all sure that this is a distinct species." — W, P. S. 



