APPENDIX—ZONITOIDES EXCAVATUS. 471 
Var. mortonii Jeffreys. 
IRELAND. 
Galway E.—Kilbeg, Sept. 1907, A. W. Stelfox. 
FRANCE. 
Alpes Maritimes —Reported rather common in the department by Comm, Caziot. 
Var—Cited for the department by M. Berenguier. 
SCANDINAVIA. 
Denmark—Recorded by Dr. Steenberg as a native of that country. 
Var. alderi (ray. 
NETHERLANDS. 
Holland—Heerenveen, Friesland, Aug. 1909 ! F. H. Sikes. 
SCANDINAVIA. 
Denmark—Var. alderi and sub-v. praticola recorded for Denmark by Steenberg. 
Var. alaskensis Pilsbry. 
NEARCTIC REGION. 
United States—Recorded by Prof. T. D. A. Cockerell from an altitude of 9,000 
feet at Tolland, Gilpin co., Colorado. 
Var. viridula 'l'aylor. 
ENGLAND. 
Gloucester W.—Very pale almost white specimens in Long Wood, Frocester ! 
C. Upton. 
GENUS ZONITOIDES Lehmann. 
Zonitoides excavatus (Bean). 
By oversight the formal description of this species was omitted in its 
proper place; I therefore give it here. 
Description—SHELL depressed, but more convex above than beneath ; thin, 
semi-transparent, and glossy; of a dark-fawn or fulvous-horn colour, with strong 
and somewhat irregular strive in the line of growth, which are fainter beneath, 
where the shell is also of a paler and yellower tint ; WHORLS five, slowly and very 
recularly increasing in size, convex, and almost cylindrical in shape ; SUTURE 
deeply and distinctly impressed ; SPIRE slightly risen ; UMBILICUS widely and per- 
spectively open, exposing all the internal spire; APERTURE small and somewhat 
oblique, margins thin, not reflected, and slightly approximating. 
Diameter 6-7 mill. ; altitude 3 mill. 
In crawling, the animal often carries the shell well elevated, and imparts to it a 
‘‘rolling” motion from side to side. 
Geographical Distribution.—he known area of distribution of this 
species has been materially increased since the publication of Part xv., not 
only by the laudable activity of conchologists, but by the privilege of access 
to previously unexamined literature. 
ENGLAND AND WALES. 
Devon S.—Erme Woods, Ivybridge, E. D. Marquand. 
Somerset S.—Dulverton, 1903 ! Hugh Watson. 
Somerset N.—Pylle (Townsend) ; under loose stones outside Worlebury Camp, 
Weston-super-Mare, F. A. Knight. Weston Wood, E. W. Swanton. 
Berks.—Bucklersbury, Sept. 1906 ! Rev. E. Peake. 
Carnarvon—Carn Bodfean near Nevin, 1901, H. C. Napier. 
Brecon—Clydach Falls, April 1909 ! F. H. Sikes. 
Cardigan—Devil’s Bridge, July 1909! B. R. Lucas. ; 
Lincoln N.— Woodhall Spa, F. W. Fierke. Tumby Wood ! W. Denison Roebuck. 
