REPORT ON THE TESTACEOUS MOLLUSCA. 239 



GASTROPODA. 



Patella vulgata, L. 

 Common on shore at Port Erin. 



Helcion pellucidum, L. 

 On Laminaria, Port St. Mary, and Colwyn Bay. 



Emarginula fissura, L. 

 Port Erin. 



Fissurella grceca, L. 

 Off south end of Isle of Man. 



Trochus maguSj L. 

 Several large specimens of the (Manx) coarse pallid form, 

 from near Port Erin. 



Trochus cinerarius, L. 



Port Erin and Port St. Mary, on the shore, large. Bar 

 of Dee, Colwyn Bay, Great Ormes Head. 



Trochus tumiduSf Mont. 

 Off south end of Isle of Man. 



Trochus zizyphinus, L. 

 Alive, off south end of Isle of Man. 



Alive, with Mactra solicla, off Great Ormes Head, seven 

 to eight fathoms. 



Phasianella pullus, L. 

 Off south end of Isle of Man. 



Velutina kevigata, Penn. 

 Off Port Erin, etc.. Isle of Man. 



Aporrhais pespelicani, L. 

 Off north end of Isle of Man, ten to twenty fathoms. 



Buccinum undatum, L. 

 Very common all along the Welsh coast, living at and 

 below low-water. • 



