124 



OVULA Leathesi. 



TAB. CCCCLXXVIII. 



Spec. Char. Elliptical^ elongated, rather ventri- 

 cose in the middle, smooth ; a large plait upon 

 the columella. 



Nearly twice as long as wide, rather contracted to- 

 wards the extremities, but hardly to be called beaked: 

 the lip is smooth, very thick, and rather flattened ; tlie 

 body of the shell has a slight concavity opposed to the 

 lower part of the lip, and near its upper extremity it 

 has a thick curved plait. There is a slight indication of 

 a ridge across the back, which may have been reduced by 

 wear. 



This Ovula appears to hold an intermediate place be- 

 tween O. passerinalis (a fossil species from the Plaicen- 

 tine. Lam. Hist. Nat. vii. 371.) and the O. Spelta, ap- 

 proaching nearest to the former, which is however de- 

 scribed as much more ventricose. The specimen figured 

 is from the rich cabinet of Crag fossils in the possession 

 of the Rev. G. R. Leathes, who obtained it at Walton : 

 it is so rare that only a fragment besides has been found. 



So well known are the researches of the liberal pos- 

 sessor of this curious shell, that no apology appears 

 necessary for commemorating his name. 



