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146 ZONITOIDES NITIDUS. 
Dr. Corner in a section exposed by sewer excavation at Canning ‘Town ; 
aud Mr. Kennard reports it from an excavation at London Wall, and from 
an alluvial deposit of post-Roman age at Uxbridge. 
In Berkshire, Mr. Kennard reports it from Neolithic beds at Newbury. 
In Oxfordshire, Mr. Kennard reports it from a buried Jand-surface of 
probably Bronze age at Caversham near Reading. Mr. H. J. Osborne 
White has found it at a depth of two feet in shell-marl in a meadow by 
the Thames opposite Wargrave, and Kennard and Woodward report it 
from a deposit by the Thames at Clifton-Hampden. 
In Suffolk W., it has been found in a deposit of a now-drained lake of 
uncertain age, but probably post-Roman, at Knettishall. 
In Gloucester W., Mr. Kennard reports it from a pre-Roman peat 
deposit at Westbury-on-Severn. 
In York S.W., Dr. Corbett found specimens thrown up by the moles in 
the dried-up bed of an ancient lake at Askern. 
In Ireland, Mr. Kennard reports it from an early alluvial deposit of the 
river Shannon at Limerick ; from co. Clare at Clanreen Crannoge and in a 
marl of uncertain age at Inchiquin. 
In Germany, it is reported by Hesse from the tufa beds at Pyrmont. 
In Belgium, it is recorded by Grégoire as rare in the ‘“'lourbe” at 
Uecle lez-Bruxelles. 
In France, M. Fagot has found it abundantly in the grey clays of 
Hers, Haute Garonne, and exactly similar to specimens still living in 
the neighbourhood. 
In Sweden, it is recorded by Dr. Westerlund from a neolithic submarine 
turf deposit at Ystad. 
In Denmark, Mr. Kennard reports it from South Zealand in deposits at 
Spjellerupgaard, and at Karebeek near Nestved. 
Variation.—he variation of this species is not important; an albine 
form has been noted, and the specimens vary in different localities, from a 
pale to a deep rich brown colour, while a form with slightly depressed 
spire has been named var. borealis by Dr. Westerlund. 
The Zonites nitidus var. parisiaca Mabille (7%. nitidus var. umbilicata 
Baudon) described as a widely umbilicated variety, from the environs of - 
Paris, and also recorded from the Oise and from Malmé in Sweden, may 
possibly be more correctly referable to Z. excavutus. 
= “ VARIATION IN SHELE. 
H WY ine) 
Var. machoi Servain, Etudes Moll. en Esp., 1880. 
SHELL very depressed in shape and openly umbilicated ; whorls 5, very convex 
and finely striated, suture deep. Aperture less lunate and almost round. 
Diam. 5°5 mill. ; alt. 3 mill. 
Spain—NSeville and Granada, Andalusia. 
Df LU \ = 
Var. albina Moquin-'l'andon. 
Flelix nitida var. 3 Jeffreys, Linn. Trans., 1830, vol. xvi., p. 339. 
Zonites (A plostoma) nitidus var. albinos Moquin-Tandon, Hist. Nat., 1835, p. 
Zonites nitidus var. albida Jeffreys, Brit. Conch., 1862, i., p. 167. 
Hyalinia nitida var. viridu/a Westerlund, 1876, p. 26. 
Hyalina nitida var, viridescens Cockerell, Nat. World, 188, p. 276. 
SHELL white or whitish. 
Sub-vars. viridula and viridescens differ in showing a greenish tinge. 
Dr. Jeffreys in 1830 under the name of H. nitida var. 8 described as “hyalina, 
albo-virescens” an Irish specimen of this variety received from Mr. Dillwyn. 
Surrey —‘‘Specimens of this variety found by Mr. Choules amongst rejectamenta 
of the Thames at Richmond ; although dead shells, they have not become bleached 
by the sun” (Jeffreys, le. ). 
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