MONOGRAPH OF BRITISH LAND AND FRESHWATER MOLLUSCA. 489 
Helicigona lapicida (L.) (see p. 399). 
Parasites.—A gamonematodon hospes, « Nematohelminth, is found in 
Helicigona lapicida, according to Dr. von Linstow. 
Geological Distribution.—Mr. J. F. Musham has found this shell in 
the Holocene deposits at Greetwell Iron Mines, North Lincoln. 
Geographical Distribution.—The correctness of the statement by 
Dr. Leach and others (see p. 415) of its presence in the South of Ireland 
has been confirmed by Mr. E. Dukinfield Jones, of Reigate, who found 
specimens at Carrig-a-brick Castle, near Fermoy, co. Cork, forty- two years 
ago, the specimens being now deposited i in the National Museum, Dublin. 
The accuracy of this ‘record has been receutly verified by Mr. R. A. 
Phillips, of Ashburton, Cork, who on being informed of the locality, visited 
the spot on Nov. 8th, 1913, and after a short search found three living and 
two dead shells under stones by a wall on the margin of the wood near the 
castle, associated with Hyalinia celluriu, H. lucida, Arion hortensis, A. 
intermedius, Hygromia rufescens, H. hispida, Pupa cylindracea, and 
Clausilia bidentuta. 
The occurrence of this species, so far removed from any of its known 
haunts, must in the present state of our knowledge, inevitably lead us to 
the conclusion that they are the descendants of individuals artificially 
introduced in the past by accident or design. 
In Denmark, Dr. Steenberg says it is widely distributed and common. 
Variation.—Dr. Westerlund has remarked upon _a dichroic variety of 
this species from the mountains of Gottsunda, near Upsala, Sweden, which 
he described as horn-coloured above and bluish-white below, which may be 
termed var. bicolor. 
Var. ecarinata Schmidt (see p. 406). 
Helix lapicida var. guyardi Caziot, Moll. terr. et fluy. Yonne, 1908, p. 209, pl. 1, ff. 18-24. 
The sub-var. guyardi differs from the 
type in its lesser diameter, greater conv exity, 
or more conoidal shape above, and its deeper 
suture; the whorls are sub-convex or less 
flattened, last whorl less deflected, and the 
mouth rounded, but not exactly circular, like Fic. §55.— Helix lapicida var. guyardi 
in H. andorrica Bourg. Diam. 14 mill. ; Caziot. Yonne, France (after Caziot). 
alt. 83 mill. 
FRANCE. 
La Pierre-qui-Vire, Yonne (Caziot, Moll. Yonne, 1908, p. 209). 
Var. albina Menke (see p. 408. 
FRANCE. 
Recorded from Vontenay, Yonne, by Comm. Caziot (Moll. Yonne, 1908, p. 209). 
Var. fasciata 'I'aylor (see p. 409). 
FRANCE. 
The sub-var. infrafasciata is represented in the British Museum by a specimen 
from Grasse, Alpes Maritimes, collected by Mr. G. Newman, 
