246 
GASTEROPODA OF THE INFERIOR OOLITE. 
broad lines of growth, and markings suggestive of colour bands are seen on 
some specimens. 
Body-whorl well within the spiral angle, and entirely without keel ; base 
rounded off ; aperture ovate-elongate with a slight posterior angle, rather flat- 
tened anteriorly and sometimes exhibiting a small notch or spout. 
Relations and Distribution. — As this species is not strictly holostomatous it 
scarcely comes within the diagnosis of Pseudomelania, unless we extend that 
diagnosis a little. The casts and section prove conclusively that it is not a 
Nerinxa. In its small habit of growth and in other respects this species resem- 
bles “ Eulima ” communis, Morr. and Lyc. said to be the most common univalve 
of the Great Oolite. The authors make no mention of the anterior notch in 
“ Eulima ” co7nmunis ; but there are specimens in my collection from the Great 
Oolite, not otherwise to be distinguished from E. communis, which show the 
anterior notch distinctly. But the whorls, and especially the body-whorl, are 
more globose in “ Eulima ” communis than in our species. 
Of. P seudomslania Laubei, Cossmann (‘ Et. Bath.,’ p. 176, pi. xv, fig. 47). No 
mention is made of an anterior notch in Mons. Cossmann’s species, but the figure 
seems to imply that there might be one. It is probable that the quondam 
“ Eulimas ” might constitute a section of Pseudomelania. 
Ps. Astonensis is rather abundant in the Parkinsoni-zone of Aston and 
Notgrove. A similar form, but smaller, has been found in the Lincolnshire 
Limestone. 
184. Pseudomelania Buetonensis, sp. nov. Plate XIX, fig. 5. 
Description : 
Spiral angle . . . . .30°. | 
Height of whorl to width . . . 1 : 2'5. 
Length . . . . .7 mm. 
Shell short, conical, scarcely turrited. Number of whorls about nine, short, 
the width equalling the height plus that of the two preceding whorls. The apex ! 
is blunt, and the succeeding whorl is globose and smooth ; the succeeding three i 
whorls are marked by stout costulse, slightly oblique to the axis ; the remaining ' 
whorls of the spire are smooth and full. j 
Body-whorl smooth and full, but not ventricose ; it occupies between one 
third and one half the height of the shell. Aperture ovate to suborbicular, i 
rather flattened in front, where there is an extremely faint trace of a notch. j 
Relations and Distribution. — The apical costulse remind us of a similar feature I 
