46 



BULMIMUS elliptici^s. 

 TAB. CCCXXXVII. 



Spec. Char. Elliptical, elongated, rather ob- 

 tuse, longitudinally ribbed ; ribs numerous, 

 very small, straight ; aperture small, twice 

 as long as wide, upon the left side. 



IxEMARKABLE for the exact similarity in form of the two 

 ends, and for the left-handed spire. It is three times as 

 long as wide, rather obtuse ai both ends, and perhaps 

 umbihcated ; the upper angle of the mouth is acute, the 

 base rounded ; the columella seems to be a little curved. 

 Length sometimes nearly four inches ; the ribs are but 

 slightly elevated, and the space between them is concave. 

 From the fresh water formation at Schalcomb on the 

 Isle of Wight, by favour of Js. Holloway and Prof. 

 Sedgwick, 



