VIVIPARA MEDIA. 37 



BemorJrs. — The specimen here given is one of several I obtained at Belangh 

 from a deposit Avhich AVood and I identified with the Tellina halthica Crag 

 of Weyl)onrne. I fignre it as it has the apex perfect, a featnre which is 

 wanting in those represented in the first Supplement to the Crag Mollusca. Messrs. 

 Kennard and B. B. Woodward, following the view we formerly held, write of the 

 Belaugh deposit as Pleistocene. As before stated, however, I now regard it as 

 belonging to an upper zone of the Norwich or Icenian Crag ; the Weybourne 

 Crag, morever, is clearly older than the so-called Forest-bed series, which is 

 included by Mr. C. Reid and others with the Pliocene deposits. 



I accept the late Henry Norton's statement that V. glaciaUs was found at 

 ColtishaJl. He was the most scrupulously exact of observers, and anything he 

 said may be relied on. 



I agree with Messrs. Kennard and B. B. Woodward that there is some doubt 

 as to the reference of the specimen I obtained from the Middle Glacial Sands of 

 Hopton Cliff to this species, a view, indeed, held also by AYood. 



It seems possible that the shell from the Norwich Crag figui-ed by S. 

 Woodward in 1833 as Palndina obsoleta is the same as the present species. In that 

 case we should have to add Bramerton, Thorpe and Postwick to the localities at 

 which the latter has been found. On the other hand, it does not appear that 

 Mr. Reeve has ever met with it during his long researches at the first-named 

 place. 



Prof. Sandberger states that V. glacialis is allied to T". pacJiya, Bourguignat, 

 from the Amur. 



Vivipara media (S. Woodward). 



183.3. Paludina media, S. Woodward, Geol. Norf., p. 44, tab. iii, figs. 5, 6. 



1848. Palndina lenta, var. jS, S. V. Wood, Mon. Crag Moll., pt. i, p. 110, pi. xii, fig. 16. 



1850. Paludina parilis, S. V. Wood, Mou. Crag Moll., pt. ii, p. 320. 



1864. Paludina media, S. P. Woodward, in White's History of Norfolk, 3rd ed., p. 118. 



1871. Paludina lenta, Jeffreys, Quart. Journ. Geol. Soc, vol. xxvii, p. 492. 



1872. Palndina media, S. V. Wood, Mon. Crag Moll, 1st Suppl., p. Q9. 

 1890. Paludina media, C. Reid, Plioc. Dep. Brit., p. 229. 



1899. Vivipara media, Keunard and B B. Woodward, Proc. Malac. Soc, vol. iii, p. 200. 



Specific Characters. — See Mon. Crag Moll., pt. i, p. 110. 



Dimensions. — L. 20 — 25 mm. B. 12 — 19 mm. 



Distribution. — Not known living. 



Fossil : Newbournian Crag: Waldringfield (A. Bell). Icenian — 

 Norwich, zone: Bramerton, Postwick, Thorpe near Norwich, Horstead, Yarn 

 Hill, Wangford, Dimwich, Sizewell, Easton Bavent, Southwold, Bulchamp, Thorpe 

 near Aldeburgh. Wei/bourne zone : Rackheath ; Freshwater bed, West Runton 

 (C. Reid). 



