BURKILL AND MARSHALL : MARINE SHELLS OF SCILLY. 55 



Lyonsia norvegica Chem. — St. Mary's Sound. 

 Cyclostrema cutlerianum Clark. — Menavawr and Muncoy 



Neck. 

 C. nitens Phil. — Menavawr and Muncoy Neck. 

 C. serpuloides Mont. — Dead at Menavawr and Muncoy; 



living under stones at low water mark, and also dredged 



living in Crow Sound. 

 Trochus granulatus Born. — St. Mary's Sound. Messrs, 



Smart and Cooke record " a few dead and imperfect 



specimens," but living examples were taken on this 



occasion. 

 Trochus granulatus van lactea Jeff. — With the preceding, 



also living. 

 Lacuna puteolus Tur. — St. Mary's, in weed at low water. 

 Rissoa striatula Mont. — Muncoy Neck. 

 R. calathus F. and H. — Muncoy Neck. 

 R. inconspicua Alder. — Muncoy Neck. This species is 



recorded as Scillonian, but with no authority, in a list 



of shells kept at Tresco Abbey. It may now be considered 



confirmed. 

 R. vitrea Mont. — St. Mary's Sound. Smart and Cooke's 



supposed a. vitrea were R. proxima, as altered in their 



Supplement. 

 R. soluta Phil. — St. Mary's Sound, Muncoy Neck, and 



Menavawr. 

 Jeffreysia diaphana Alder. — St. Mary's, in weed. 

 Skenea planorbis Fabr. — Under stones and on weeds 



between tide-marks. 

 Caecum trachea Mont. — Menavawr and Muncoy. 

 C. glabrum Mont. — St. Mary's Sound, Menavawr, and 



Muncoy. 

 Aclis unica Mont. — Muncoy Neck. 

 A. ascaris Tur. — Muncoy Neck. 

 A. supranitida S. Wood. — St. Mary's Sound. 

 A. gulsonae Clark. — Muncoy Neck and St. Mary's Sound. 



