EULTMENE TEIJ EI5EI.LATA. 5'.):) 



1848—72. Pahuleatrlno terehollaia, S. V. Wood. Mon. Cim<;- Moll., pt. i, p. lOO, pi. xii fitr. 7, IHtR ; 

 EuVunene ternbellafa, 1st Suppl., pt. i, p. 65, 1872. 



1871. Paludestrina terehellata, Jeffreys in Prestwicli, Quart. Jourii. (lool. Sdc, vol. .\xvii, p. 49:5. 



1872. Paludestrina terehellata, A. and R. Bell, Proc. Geol. Assoc, vol. ii, p. 200. 



1874 — 92. Paludestrina (Euliinene) terehellata. Van den Broeck, Ann. Soc. malac. Bolsj^., vol. ix, 

 p 273, 1874; Lifforina terehellata, Bnll. Soc. Buli-'o (\i-o\., vol. vi (Menioiros), \y \X\, 1892. 



1886. Hydrohia terehellata, Komlali and R. G. Bell, Qiuirf. Joiirn. (I<v)l. Soc, vol. xlii, j., 211. 



1893—98. EuUmetie terehellata, A. Bell, Proc Roy. Irish Acad. |31,vol. ii, p. 629, 1893; Trans. 

 Roy. Geol. Soc Cornwall, vol. xii. p. 150, 1898. 



1912. Litforina lerehellata, Tcsch, Med. v. d. Rijks. v. Delfstoffen, No. 4, ]>. 64, no. 137. 



1915. Littorinnpsis terehellata, Cossniann, Palroconcli. conip., vol. x, p. G-\ pi. iii, fi<>'s. 11, 12. 



Specific (/IJuiracters. — Shell olongato-conical, tnrreted, strong and solid ; whorls 

 7 or 8, flattened and smooth, with a subangulate base ; spire regularly tapering to 

 a 1)1 unt and twisted point ; suture channelled, but not deep ; mouth ovate, angu- 

 lated above; inner lip slightl_y reflected, covering the umbilicus. 



Dimensions. — L. 16 mm. B. 8 mm. 



Distrilniilon.- — 'Not known living. 



Fossil : St. Erth. Waltonian Crag : Walton-on-Naze, Beaumont, 

 Little Oakley. Newbonrnian : Waldringfield, Sutton, Ramsholt, Newbourn, 

 Felixstowe. Butleyan : Hollesley, Bntley. Scaldisien : Belgium, Holland. 



Remarks. — The genus Eulimoi.e was proposed by Wood for the two species 

 here described, which he considered allied to NIso, but differing from it by the 

 absence of a large open umbilicus. The present form, recorded only from St. 

 Erth and the Anglo-Belgian l)asin, is fairly abundant at all the Waltonian locali- 

 ties, bnt is less so at the later horizons of the Red Crag. It is unknown, however, 

 from the Coralline, and seems to have disappeared from these regions before the 

 commencement of the Tcenian period. Although apparently a rather strong and 

 solid form, specimens are so fragile that, as Wood remarks, it is very difficult to 

 obtain any from the Crag that are perfect or unworn, but it is so generally diffused 

 in our Red Crag deposits that it is difficult to regard it as derivative. Examples 

 of the allied species E. pendula, which are also common in the earlier part of the 

 Red Crag, although thinner and more delicate, are, on the contrary, generally in a 

 better state of preservation. 



Beside the typical form, well represented in Wood's figure, Mr. Bell has 

 described two varieties fi-om St. Erth, one having an elongate and more slender 

 spire, his var. acuininafit, and another, var. coiiica, which is shorter and more 

 distinctly conical. 



F. terehellata, with its varieties, may be distinguished from E. pendula by its 

 rather strong, though obtusely, angnlated base. 



M. Cossmann has rejected Wood's genus Eulimene (1872) for the present 

 species, referring it to Littoniiopsis, Beck {fide Morch, 1876). Nyst's original 

 name for it was Melania terehellata. 



