88 EOCENE MOLLUSCA. 
lip not so oblique. From JZ. ¢umida it is separated by the shorter spire and the flat 
sulcated columella. 
Size—Axis, 1 inch and 7-10ths; diameter, 9-10ths of an inch nearly. 
Locality—Headon Hill. 
No. 35. Limnza susLatTa. Ff. #. Edwards. Tab. XIII, fig. 4a—é. 
L. testa ovato-acutd, ventricosd: anfractibus sex, conveais, levibus; apertura rotundato- 
semi-ovali, per-obliqua, ampld, spiram in longitudinem paulo superanti; margine externo 
reflexiusculo ; plicad columellari compressiusculd, angustd, parum eminenti, valde tortuosd. 
A smooth, ventricose shell, with a moderately elevated spire, and an acute apex: 
the six whorls of which it is formed are convex, and separated by a conspicuous but 
not deep suture; the aperture is roundedly semi-oval, effuse, and a little longer than 
the spire. The outer lip is very oblique, and slightly reflected; the inner one scarcely 
extends beyond the aperture; the columella is much twisted, and the small narrow 
fold is compressed and very little prominent. 
Owing to the great obliquity of the aperture, the shell must have been carried by 
the animal with the spire more raised than is usually the case in this genus; from 
this peculiarity the specific name has been taken. 
The present species approaches nearly to LZ. giddosula, but the spire is longer and 
more pointed, the whorls more ventricose, and the aperture shorter in proportion, and 
more oblique. The greater convexity of the whorls, the shorter spire, the narrow, 
slightly projecting fold, and the effuse and oblique aperture, distinguish it from 
L. pyramidalis. Vt appears to be rare. 
Size-—Axis 14 inch; diameter 8-10ths of an inch. 
Locality.—Headon Hill. 
No. 36. Limnaa MIxTa. Ff. £. Hdwards. Tab. XII, fig. 5 a—é. 
L. testa ovato-acutd ; spird elevatd ; anfractibus sex vel septem, convexiusculis, longi- 
tudinaliter striatis, ultimo magno, sub-ventricoso: apertura ovali, anticé coarctatd, bessem 
totius teste in longitudinem fere aquanti ; plicd columellari sub-rectd, angustd, compressi- 
usculd, parum eminenti, obscure sulcatd. 
An ovate shell, with a moderately elevated pointed spire; volutions six or seven, 
slightly convex, almost flat on the upper parts composing the sides of the spire, and 
marked more strongly than usual in this genus by conspicuous irregular lines of 
growth ; the body whorl large and rather ventricose. The aperture is oval, contracted 
in front, and, in length, nearly equal to two thirds of the whole shell; the colu- 
mellar fold is very little twisted, narrow, slightly flattened, barely prominent, and 
obscurely sulcated. 
