130 TRANSACTIONS, NATURAL HISTORY SOCIETY OF GLASGOW. 



The three varieties of form comprise the type, the 

 variety conoidfea, Picard, and a variety which I have 

 named depressa. This last form I believe to be new, 

 and the following is a short description of it. 



Helix aspersa, Muller, var. depressa, mihi. 



Spire much more depressed than usual (not from injury, but 

 the result of natural growth) ; diameter 32 mm., altitude 25.^ mm. 



This form seems to be rare abont Tarbert, but I 

 have observed two specimens near Rothesay that 

 are even more depressed than the one now described. 

 Their dimensions are respectively (1st) diam. 37 mm., 

 alt. 28 mm. ; (2nd) diam. 32i mm., alt. 26 mm. 



Of Helix nemoralis, L., there were observed several 

 varieties both of form and colour. These included 

 the type form ; the variety minor, Moq. (diam. 19^ mm., 

 alt. 17| mm.) ; variety major '! Fer. (diam. 24mm., alt. 

 19knm.) ; varieties roseolabiata, Taylor, albolabiata, 

 Von Mart., libellula, Risso, and carnea, as well as 

 several variations in the number and arrangement 

 of the bands. 



Of Helix rotunclata, Mull., the two varieties alba, 

 Moq., and Turtoni Flem., were also found ; but both 

 appeared to be rather rare, especially the former. 

 The latter is distinguished by its almost flat spire. 



Of Helix arbustorum, L., there were also several 

 varieties observed in addition to the typical form, 

 the most distinct of these being varieties mar- 

 morata, Taylor, of the usual colour but without a 

 band; flavescens, Moq., yellowish or yellowish-white, 

 also without a band; cincta, Taylor,* of the same 



* According to this arrangement, the variety of H. arbustorum 

 mentioned in my List of the Greenock Land and Fresh-water 

 Mollusca as var. flavescens (see Transactions, vol. i., p. 285), should 

 be var. ci/ncta. When preparing that list I followed Jeffreys in 

 considering both forms as included in v ax. flavescens. 1 may here 

 state, however, that owing to the interest taken in conchology by 

 my son Andrew, I am now able to include a typical flavescens 

 among the Greenock molluscs, a specimen having lately been 

 found by him in the vicinity of that town, at a place which I have 

 long known as a habitat of II. arbustorum. 



