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HEY : MARINE SHELLS OF YORKSHIRE. 



Acmaea virginea Miill. 



Abundant and fine near White Nab, Scarborough. The 

 spedmens must be sought for under stones at spring tide low- 

 water mark. Also at Redcar. 



FISSURELLIDv^, 



rissurella reticulata Don. 



Has been recorded fi-om Redcar (Ferguson). 



CAPULID^. 



Capulus Hungarieus L. 



I have met with this sheU in no Yorkshire locality but Redcar, 

 and only once there. 



TROCHIDAL. 



Trochns helicinus Fab. 



Dead low-water mark at White Nab, Scarborough. 

 Trochus tumidus Mont. 



I have dredged this species in a few fathoms water in 

 Bridlington Bay. 

 Trochus cinerarius L. 



In shallow pools and under loose stones between tide marks. 

 Common and general — e.g., at Saltburn, Filey, Flamborough. 

 Trochns zizyphinus L. 



Scarce. Sometimes cast up on Redcar sands. Has been 

 found living on Salt Scar. 



LITTORINID^. 



Lacuna vincta Mont. 



A common species near low-water mark on all our rocky 

 coasts. It may be obtained in quantities by cutting a handful 

 of Fucus, and steeping it in fresh water, when the shells sink to 

 the bottom of the vessel. I have it from Scarborough, Filey, 

 and Saltburn. 

 Lacuna pallidula Da Costa. 



On seaweed between tide marks. Fairly abundant at Scar- 

 borough, Filey, and Saltburn. 

 Littorina littoralis L. 



Ver)^ general on flat rocks anywhere below high-water mark — 

 Saltburn, Scarborough, &c. The commonest form is olive, 

 with a purple-stained lip. A brown form with darke]*reticulations 

 is also frequent. 

 Littorina neritoides L. 



In crannies of the rock on Filey Brig, where it rises just above 

 high-water mark. 



Naturalist, 



