APPENDIX—HELIX POMATIA. 479 
Dr. Otto Biichner, who has made a special study of, and published 
treatises exclusively dealing with Helix pomatia, has figured what he 
regards as representative examples of both these forms, which are repro- 
duced here as indicating his views as to the precise identity of the 
different varieties. 
The sub-var. spheralis being described as an extremely globose though 
not as a large shell, the specimen now figured must represent a major 
form of this sub-variety. 
GERMANY. 
Wurtemburg—The var. inflata is quoted by Dr. Biichner for Schussenried, 
Stuttgart, Warthausen, and Neuhausen-am-Fildern, and the sub-var. spheralis is 
recorded by him for Uhingen, Warthausen, and Biberach. 
Var. turrita Biichner. 
The var. turrita is described as very variable in size, with a strikingly elongated 
spire, and mostly thick shelled, especially in the larger specimens ; the ground colour 
is usually pale, and the umbilicus more or less covered or concealed. 
The specimen figured and described as in. turritwm on p. 228, pl. xxi., was abnormal, 
as there stated, but the figure and description of Dr. Biichner indicate a regularly 
coiled though elongate spire. 
Wurtemburg—The figure of the type given by Biichner is reproduced. This 
form is described as having been found at Stuttgart, Solitude near Stuttgart, and 
Neckarthailfingen. 
. : Ler 
, = ae 
Fic. 549.—Helix pomatia var. turrita Fic. 550.—Helix pomatia var. ponderosa 
Biichner. Wurtemburg (after Biichner). Baudon. Wurtemburg (after fig. by Biichner). 
Var. ponderosa Baudon. 
Dr. Biichner, though figuring this characteristic specimen of var. 
ponderosa, does not allude to it under that name, as, having regard only 
to its form, he considers it as an intermediate state between the vars. 
spheralis and turrita. 
GERMANY. 
Wurtemburg—Specimens of great solidity and thickness referable to this variety 
are recorded by Dr. Biichner, 
