PULMONATA. 119 
Cyclostomide, and the attenuation of the last whorl induces me to place it in the present 
genus, apparently the only one in the family to which that character belongs. I refer 
it, however, to Craspedopoma provisionally only, until, by the acquisition of more 
perfect specimens, its true position may be ascertained. 
This elegant shell was discovered by Mr. D’Urban and myself, on a recent visit 
to the Isle of Wight, accompanied by Miss D’Urban, to whom, in commemoration, I 
have ventured to dedicate it. It is apparently very rare, and although we procured 
several specimens, not one had the shell preserved. 
Size.—Axis, 4-20ths of an inch; diameter, 3-20ths nearly. 
Locality.—Sconce. 
Hexicina.—The shell described by Lamarck as Helicina dubia is found in the 
High Cliff sands, and at Barton; it is, however, a Fofe//a, and will be described in its 
proper place. 
In order that this account of our Eocene pulmonated molluscs may contain all 
the species at present known, I subjoin the description of a shell acquired by me 
since the early part of this monograph was printed, and which I have referred to 
Bulimus, although the aperture is of a form unusual in that genus. 
No. 70. BuLimus neTEROSTOMUS. F. H. Hdwards. Tab. XIV, fig. | a—d. 
B. testd parva, conicd; spird elevatd, acutiusculd, apice deciduo ; anfractibus septenis 
vel octonis, rotundatis, transversim regulariter lineatis; lineis tenuissimis, numerosis, per- 
obliquis: apertura rotundo-ovatd, peristomate reflexo. 
This shell has so much of the character and appearance of Zruncatella, that | 
should be inclined to refer it to that genus; but it is found associated with land and 
true fresh-water shells only, in a formation which does not present any trace of marine 
origin. The nearly circular aperture resembles that of Cyclostoma; the transverse 
lineation, however, is a character which, I believe, is not ever found in that genus. I 
have referred it to Bulimus, but with some hesitation. It is a small conical shell, with 
an elevated, tapering, pointed, spire, the apex of which is subject to decollation ; the 
seven or eight whorls of which it is formed, are rounded, separated by a deep suture, 
and ornamented with fine transverse raised lines, which are numerous, regular, and 
very oblique; the aperture is roundedly ovate, apparently thickened within, and with 
