GASTEROPODA. 49 



EULIMA SUBGLOBOSA. Plate IX, fig. 6. 



E. Testa lam, ovato-conicd ; spird subcontortd; anfractibus convexis, angustatis, anfractu 

 ultimo subgloboso ; aperturd oUiqiid, ovatd. 



Shell smooth, ovately conical ; spire rather contorted ; whorls convex, narrow, the last 

 whorl subglobose ; aperture oblique and ovate. 



A small globose species, the spire of which is rather angular, its length being somewhat 

 less than that of the last whorl. 



Locality. It is rare, and occurs in the soft shelly Oolite of Minchinhampton Common. 



CHEMNITZIA, D'Orbigny. 1839. 



Shell turreted, elongated, not umbilicate ; volutions numerous, frequently costulated ; 

 aperture oval or angular, anteriorly large, retracted posteriorly ; columella straight and 

 smooth ; outer lip thin and smooth. 



CHEMNITZIA LONSDALEI. Plate VIII, figs. 13, 13a. 



C. Testa turritd, apice acuto, lavigato ; anfractibus in medio profunde constrictis vel 

 sulcatis, suturis vix impressis ; aperturd, elongato-ovatd, superne constrictd. 



Shell turreted, elongated, acute, smooth; whorls deeply constricted, or sulcated in their 

 middle part ; sutures of the whorls sometimes scarcely distinguishable ; aperture elongated 

 and ovate, narrow posteriorly. 



For the first four volutions the mesial depression is but slightly marked; but it gradu- 

 ally increases in depth, the last two or three whorls being deeply grooved. Several oolitic 

 species approach this shell, more especially the Melania lineata of the Mineral Conchology 

 and the M. procera of Deslongchamps ; in the latter species, however, the concavity of the 

 whorls is always very slight, and is sometimes not appreciable. Axis 3 inches 3 lines ; 

 transverse diameter 10 lines; length of aperture 10 lines; breadth of aperture 5 lines. 



Locality. Our species is moderately rare ; it has been found only in the planking of 

 Mmchinhamptou Common. 



Named after W. Lonsdale, Esq., F.G. S., whose valued contributions to Geology, 

 especially among the oolitic series, are well known. 



CHEMXITZIA SIMPLEX. Plate VII, fig. 15. 



C. Testa magnd, turritd, elongatd, l<zvi; anfractibus convexis, suturis prof unde imp, 

 aperturd olliqud ovatd ; columelld marginatd, rofundatd, subrectd ; labro inferno cfftiao. 



Shell turreted, elongated, smooth; whorls convex, the sutures deeply impressed, aperture 

 oblique, ovate; columella marginated, rounded, nearly straight ; inner lip effuse. 



