KENNARD & WOODWARD : BRITISH PLIOCENE NON-MARINE MOLLtrSCA. 193 



identical with this species. V. pulcliella occurred in a boring at 

 Amsterdam at a depth of 229 metres/ thus proving its existence on 

 the continent in pliocene times, for the next earliest record is from 

 the lower pleistocene of Mosbach. 



9. Helicodonta lens (Fer.). 



Form, and Zoc— Red Crag : Walton. 



An example of this species is stated by Robert BelP to have 

 been found at Walton about 1881 by Mr. Larcher, of King's College. 

 The shell was identified by Dr. Gwyn Jeffreys and Mr. J. H. Ponsonby ; 

 but we' have been unable to trace the specimen. The species is 

 not recorded in a fossil state on the continent. 



10. Helicigona arbitstorum: (Linn.). 



Helix arlustorum, Linn. : S, Y. Wood, Crag Moll., vol. i, p. 3, pi. i, 

 fig. 3. 



Form, and Loc. — lied Crag : Butley (Ipswich Mus. and E. R. 

 Sykes Coll.). Norwich Crag : Coltishall (Brit. Mus. and Mus. Pract, 

 Geol.) ; Southwold (S. Y. Wood) ; Postwick (Mus. Pract. Geol.). 



All the examples seen differ somewhat from the normal form, but 

 we have no doubt as to the determination. Its first recorded appearance 

 on the continent is in the lower pleistocene of Mosbach ; but in the 

 middle and upper pleistocene it has been found at Lyons, Nussdorf 

 near Yienna, Bruchsal in Baden, and numerous other localities. 



11. Helix lactea, Miill. 



Form, and Log. — Red Crag : Walton (Brit. Mus.), 



A fine example, nearly perfect, was found in 1883 at Walton by 

 Robert Bell, who states^ that it "resembles an Algerian form more 

 than any other." The fragment belonging to the same species which 

 he says he also found we have been unable to trace. Helix lactea is 

 unrecorded in a fossil state on the continent. According to Hanley* 

 the correct name for this species is Helix lucorum, Linn., but that 

 question lying beyond the limits of this paper Miiller's better known 

 name is here employed. 



12. Cochlicopa ltjbrica (Miill.). 



Bulimus luhricus, Miill. : S. Y. Wood, Crag Moll., Suppt. II, p. 38, 

 pi. iv, fig. 10. 



Form, and Zoo. — Red Crag : Butley (two examples, Ipswich Mus.). 



1 Dr. J. Lorie, " Contrib. a la Geol. des Pays Bas " : Bull. Soc. Beige Geol., 



torn, iii (1889), p. 435. 



2 E. Bell, "Land- Shells in the Eed Crag" : Geol. Mag., 1884, p. 262. 



3 Geol. Mag., 1884, p. 264. 



*.S. Hanley, " Ipsa Liuna3a Conchylia," p. 378. 



