196 PKOCEEDIJrGS OF THE MALACOLOGICAL SOCIETY. 



it is impossible to trace all the specimens figured by "Wood ; but 

 with the exception of a solitary example of L. auricularia, all the 

 representatives of this genus that we have seen from the Crag are 

 referable to these three polymorphic species, and consequently the 

 identifications of L. Pingelii, Moll., L. Hollollii, Moll., and L. elodes, 

 Say, seem unreliable. L. pereger is common on the continent in beds 

 of pleistocene age, and it is also known from the upper pliocene of 

 Castellarquato, near Piacenza, northern Italy. 



21. LlMN^A PALTJSTEIS (MiilL). 



LimncBa Pmgelii?, Moll.: S. Y. "Wood, Crag. Moll., Suppt. I, p. 3, 

 pi. iv, fig. 4. 



Form, and Loc. — Eed Crag : Butley. Norwich Crag : Coltishall ; 

 Bramerton Common ; Blake's Pit, Bramerton ; Yarn Hill; Bulchamp 

 (Prestwich). 



This well-known form was apparently as variable in pliocene as 

 it is in recent times. It is first recorded on the continent from the 

 lower pleistocene of Mosbach, and it has also been noted from the 

 tipper pleistocene of Yinograd, near Buczak in Ukraine, and Kilian- 

 stadten near Hanau, as well as numerous other localities in France, 

 Germany, and Austria. 



22. LlMNiEA TRinsrCATTJLA (Miill.). 



Form, and Loc. — Eed Crag : Butley. Norwich Crag : Bramerton 

 Common ; Thorpe, Norfolk. 



The species is by no means rare at Butley, but it is apparently very 

 scarce in the Norwich Crag, since we have seen only three examples 

 from that deposit. Wood states ^ that he has never seen the true form 

 of this species from any English pliocene deposit, and considers that 

 the specimens so called should be referred to L. HolhoUii, Moll. ; but 

 L. truncaUda is an extremely variable form, and all the Crag variations 

 can be matched with recent English examples. Its earliest recorded 

 appearance on the continent is from the lower pleistocene of Mosbach. 

 It is also known from the upper pleistocene of Oberissigheim near 

 Hanau, of Eussia and Algiers. 



23. Planoebis coenetjs (Linn.). 



Planorhis corneus, Linn, : S. Y. "Wood, Crag Moll., vol. i, p. 10, pi. i, 

 fig. 12. 



Form, and Loc. — Norwich Crag : South wold (Brit. Mus.) ; Bulchamp 

 (S. Y. Wood). 



A single example, and that immature, is the only evidence of the 

 existence of the present species in pliocene times in England that 

 we have seen. This is yet another of those forms which are first 

 recorded fossil on the continent from the lower pleistocene of Mosbach. 



1 Crag Moll., Suppt. I, p. 3. 



