12 DUNDET GASTEROPODA. 



Our specimen is intermediate between the descriptions of the 

 first two authors cited. It has the more distant costas of the 

 German specimen, but the more marked longitudinal ridges and 

 the narrow open umbilicus of the French. Quenstedt deemed the 

 distance between the costal sufficient to distinguish his species. 

 "We should like further evidence on this point. "We have, 

 unfortunately, only one specimen. In the mean time we adopt 

 the older name. At any rate, we cannot allow that P. Orhignyana 

 should be separated because of its smaller size and sharper ribs 

 merely. It is probaby a dwarfed descendant of the Inferior 

 Oolite shell. 



We have a single specimen only. 



Locality — Dundry. hif: OoL 



It has been cited by Dr. "Wright from Somersetshii-e, (loc. cit. 

 p. 37.) 



PURPUEINA INPLATA, n. sp. PL 3, fig. 9. 



Height 32 mm. Breadth 27 mm. 



SheU subglobose, spire depressed: whorls rounded, with a 

 flattened space at the suture, forming an angle with the rest of 

 the whorl. Last whorl inflated, with numerous transverse 

 rounded costae, which are prominent at the angle, but gradually 

 fade away towards the base, j^umerous fine longitudinal ridges ; 

 umbilicus probably closed. 



"We have considerable reluctance in making a new species. 

 "We have tried to identify it with F. Coronata, Heb. and Desl. 

 (Bull. Soc. Linn. deiN'orm. Y. pi. 1, fig. 6), but it is more globose, 

 the costse more oblique, longitudinal lines more numerous, &c. 

 Moreover the French authors consider the Inferior Oolite forms 

 distinct from their species. 



We have only two specimens. 



Locality — Dundry. Inf: Ool. 



