124 XEROPHILA ITALA. 
VARIATIONS IN FORM OF SHELL. 
y sae fe o) Snh 
Var. charpentieri Moquin-Tl'andon. 
Helix ericetorum var. charpenticrt Moy.-Vand., Hist. Moll. France, 1835, p. 253. 
Hleltx ericetorum var. pyramidata Baudon, Moll. Oise, 1862, p. 25. 
Helix ertcetorum var. instabilis Jeffreys, Brit. Conch.. 1862, vol. i, p. 216. 
Helix morbihana Bourguignat in Locard’s Prodr., 1882, pp. 97 and 324. 
Helix evtcetorum var. servierensis Germain, Moll. Maine-et-Loire, 1903, p. 121, pl. 2. 
Helix ertcetella var. alta Caziot, Moll. Monaco, 1910, p. 277. 
The var. charpentieri Mog.-Tand. is described as a little less depressed with 
an umbilicus in conformity. 
The sub-var. pyramidata Baudon is extremely convex and pyramidal, and 
tends to become sealariform. 
Fic. 181. Fic. 182. 
Fic. 18l. —\. t/ala var. pyvamidata Baudon, near Compiegne, Oise (after Baudon). 
Fic. 182.—N. ttala var. morbihana Bourguignat, Auxerre, Yonne (after Caziot). 
The sub-var. morbihana is distinguished from the type by its more conical 
form, its convex, quite cylindrical whorls, narrower umbilicus, and its dilated, 
thickened, and yet sharp peristome. ‘The shell is also usually white and somewhat 
glossy, but is sometimes fasciated. 
The sub-var. servierensis Germain is more elate, conico-convex above, with 
narrower umbilicus, finely and regularly striolate. Diam., 11-15 mill. ; alt., 
S$-11 mill. 
Fic. 183. Fic. 184. Fic. 180. Fic. 186. 
Fic. 183, 184.—\V. fta/a var. servicrensits Germain, Beaulieu, Maine-et-Loire, France x 14. 
Fic. 185, 186.—\. ‘tala var. instabilis Jeffreys, ‘Tiree Island, Rev. J. E. Somerville, x 13. 
The sub-var. instabilis Jeffreys is described as shell smaller, of a darker colour 
and sometimes streaked or spotted ; spire more raised ; umbilicus narrower. 
The sub-var. alta Caziot is not deseribed or figured, the name being probably 
regarded as descriptive. 
The variety from Iona, recorded by Dr. Jeffreys as var. instabilis Ziegler, is 
probably not that form, but until a knowledge of its internal structure is available, 
had perhaps best be included under this head. 
Living specimens referred to the var. dvstabilis Jetfr., collected in the Isle of 
Tiree, by Rev. J. E. Somerville, examined in 1889, did not exsert the body much 
beyond the shell when crawling, the back and sides were very dark bluish-black, 
the body tubereles distinct but not crowded, tentacles moderately long and slender, 
dark grey in shade, becoming paler distally ; foot-sole yellowish, foot fringe with 
transverse lineations. Possibly it may be shown to be structurally different from 
V. ‘tala when carefully examined. 
BRITISH DISTRIBUTION. 
England—Specimens with a more or less elevated spire have been recorded from 
Winchester, Hampshire ; Eastbourne, East Sussex ; Durdham Downs, Gloucester ; 
Clevedon, North Somerset ; Porthywaen Quarries, Shropshire ; Skegness, North 
Lincoln ; Birstwith, Mid-West Yorkshire ; and Kirkmichael, Isle of Man. 
Scotland—Fife ; Isle of EKigg, North Ebndes ; Killoran Bay, Colonsay, South 
Kbudes ; Isles of Lona and Tiree, Mid Eludes ; also on Barra and Butt of Lewis, 
Outer Hebrides ; and sub-var. tnstabilis is cited by Dr. Jeffreys from Mull, and 
lona, and was found on ‘Tiree Island by Rev. J. E. Somerville. 
Ireland—Phenix Park and Malahide, eo. Dublin; Clara, Kine’s co. ; Achill 
Island, West Mayo; Gleninagh, Clare, and Strabally, Kerry. 
The sub-var. tnstabilis Jetfr. is recorded from Connemara, Galway, by Jeffreys. 
