— 
202 MONOGRAPH OF BRITISH LAND AND FRESHWATER MOLLUSCA. 
GENwWS PLANOSPIRA Beck. 
Planospira vectiensis (Edwards). 
Helix vectiensis Edwards, Mon. Eoe. Moll., 1852, p. 62, pl. x., ff. 8 a-e. 
— (Fruticicola) vectiensis Sandberger, Vorwelt, 1872, p. 290, pl. 17, ff. 1-1 e. 
— cocciphora Edwards, MSS. 
— trochila Edwards, Mss. 
SHELL more convex above than below, the moderately elevated SPIRE com- 
posed of about five bluntly convex WHORLS, depressed at the sutures, and thickly 
covered with minute puncticulations. The APERTURE is obliquely semilunar, with 
a strongly reflected lip, which partially conceals the deep and moderately wide 
UMBILICUS. In its young state the shell is slightly carinated. 
Diam. 10 mill. ; alt. 5 mill. 
Sete 
ME a3 : eeu 
£ | eee ve 
a z Tig 
4 : . PA § 
entanani™ 4 
Fic: 256. Fic. 257. 
Planospira vectiensis (Edwards). 
Fic. 256.—Natural size. Fic. 257.—Rear, frontal, and basal aspect, x 23. 
Fic. 258.—Sculpture of body-whorl, x 4. 
Mr. Edwards remarks that casts in the Limnzean limestone at Sconce 
are not uncommon, but that the shell itself is very seldom preserved. 
he casts are separable from those of Hyalinia @urbani, with which they 
are most liable to be confused, by the narrower umbilicus, and by the 
impression of the reflected lip. When the shell is preserved, the puncti- 
culate surface is a sufficient distinguishing character. 
In the opinion of Mr. 
Gardner, who has examined 
the type specimens of Helix 
cocciphora and Helix trochila 
of Edwards, in the British 
Museum, both forms should 
Fic, 259. Fic. 260. be included with Planospira 
Planospira cocciphora Planospira trochila SDAP Dann : apiakenh Ware 
(Edwards Ms.), X 3. (Edwards. Ms.), X 3. VECtiensis. Planospira Cocct 
After photographs of Edwards’ type specimens in the phora, however, judging from 
British Museum, the photographs of the type 
specimen here reproduced, shows a much more indented suture and 
rounder whorls than P. trochila. 
Mr. Edwards compared this species with AZ. rwfescens Miiller, from which 
he distinguished it by its less rounded whorls, larger umbilicus, strongly 
reflected peristome, and pitted surface. 
Mr. Gardner has remarked on the resemblance of this species to Heli 
fallaciosa Pfr., from the Island of Ceylon, while Prof. Sandberger placed 
its relationship with /eliaz argillacea Feér., a native of the Island of 
Timor. 
Oligocene —Isle of Wight : Recorded by Edwards from the Bembridge limestones 
at Sconce near Yarmouth, and Headon Hill. Mr. Ashford also quotes’ Bembridge, 
Hempstead, Whitecliff Bay, ete. 
