88 EOCENE MOLLUSCA. 



lip not so oblique. From L. tumida 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. Limnjea sublata. F. E. Edioards. Tab. XIII, fig. 4 a — b. 



L. testa ovato-acutd, ventricosd: anfractibus sex, convexis, lavibus; aperturd rotundato- 

 semi-ovali, per-obliqud, ampld, spiram in longitudinem paulo superanti; margine externo 

 reflexiusculo ; plica columettari 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 L. gibbosula, 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. pyramidaiis. It appears to be rare. 



Size. — Axis 1 \ inch ; diameter 8- 1 Oths of an inch. 



Locality. — Headon Hill. 



No. 36. LiMNiEA mixta. F. E. Edwards. Tab. XIII, fig. 5 a — b. 



L. testa ovato-acutd ; spird elevatd ; anfractibus sex vel septem, convexiusculis , longi- 

 tudinaliter striatis, ultimo magno, sub-ventricoso : aperturd ovali, antice coarctatd, bessem 

 totius testes in longitudinem fere aquanti ; plica columettari sub-recta, angustd, compressi- 

 usculd, parum eminenti, obscure sulcata. 



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. 



