Mollusks. 3363 



Cardium edule. Abundant after rough weather in both Weymouth 

 and Smallmouth Bays. 



Cardium nodosum may at times be found upon the sands in Small- 

 mouth Bay. 



Modiola barbata. On April 1st, 1850, one was taken alive on the 

 Smallmouth Sands. 



Crenella discors. March 8, 1850.-— I found it this day attached to 

 the under side of large loose pieces of rock between tide-marks, be- 

 low Sandsfoot Castle, in some numbers. It is also frequently washed 

 up, both on the Smallmouth Sands and in Weymouth Bay. Once I 

 saw it, in the former locality, strewing the beach from one end to the 

 other, at half-tide level. 



Area lactea. Adhering to oysters in abundance, when they may be 

 obtained from the fish-women in the market, and the oyster-dredgers. 



Pecten opercularis. Washed up on the Weymouth and Small- 

 mouth Sands, after rough weather, in abundance. There are large 

 beds of this mollusk in the bay, and it may be frequently seen in the 

 markets, where it is sold for food. I have seen single valves of the 

 variety lineatus on the Smallmouth Sands. 



Fissurella reticulata. Weymouth and Smallmouth Sands, after 

 stormy weather. 



Trochus Zizyphinus. This mollusk may be found, and is not un- 

 common, among the rocks at the end of the pier, also under stones 

 on the inner or harbour side of the pier. In order to find the shells 

 in the former locality, it is necessary to turn over the large rocks, to 

 the under side of which they may be found adhering. In the other 

 situation, turn back the sea-weeds from the rocks, when the mollusks 

 will be seen. 



Rissoa cingillus. Attached to the under side of loose stones, among 

 the flat ledges of rock beneath Sandsfoot Castle. 



The above Bays are likewise very rich in Crustacea, for an enu- 

 meration of which I may refer to Mr. Thompson's paper on the Crus- 

 tacea of Weymouth, in the number for July, 1851 (Zool. 3158). 



ECHINODERMATA. 



Solaster papposa. Weymouth Bay. 

 Asterina gibbosa. Smallmouth Sands. 

 Palmipes membranaceus. Weymouth Bay. 

 Uraster rubens. Very large. 



