146 JOURNAL OF CONCHOLOGY. 



MATERIALS FOR A MOLLUSCAN CATALOGUE 

 OF SUFFOLK. 



Can any of the readers of the ' Journal of Conchology ' 

 aid me in precisely identifying by any well-known name the 

 following shells mentioned by Rev. Revett Sheppard in his list 

 of Suffolk shells, and by Dr. Leach in his MoUusca of Great 

 Britain : 

 (i) Tellina stagnicola. — This is identified in Turton's 'British 



Shells ' with Cyclas cortiea var. stagnicola but it is not 



mentioned in Jeffreys'. 



(2) Mytilus macula. — This is probably a variety of Anodonta 



anatina, but is not mentioned by Turton or Jeffreys. 



(3) Helix spirorbis. — This, one would naturally suppose to be 



Planorbis spirorbis, but there seems to be doubt in Mr. 

 Sheppard's mind, though he identifies it with Helix 

 spirorbis of Montagu, which is again identified with 

 Planorbis spirorbis by Turton. It is not Linnseus' 

 Helix spirorbis which corresponds to Planorbis albus. 

 Nor is it Draparnaud's Planorbis spirorbis. 



(4) Cyclas alata which is found in Leach's MoUusca of Great 



Britain, p. 291. 

 I am anxious to identify these shells beyond doubt in order 

 to include them in a catalogue of Suffolk shells. Any assistance 

 towards the latter would much oblige. 



CARLETON GREENE. 



Helix pisana var. scalariformis. — While at Tenby 

 last year I took this variety on the downs above Giltar Point, 

 I secured two specimens. — H. Milnes, Winster. 



Limax agrestis and Cochlicopa lubrica at St. 

 Thomas, Canada. — On July 8th, 1887, I found Limax 

 agreslis (the type unspotted), and Cochlicopa lubrica at St. Thomas, 

 in the province of Ontario. — T. D. A. Cockerell, West Cliff, 

 Colorado. 



J.C, vi., Oct., 1889. 



