NEWTON AND HARETS : OLIGOCENE AND EOCENE PITLMONATA. 71 



of Sowerby's species, H. glohosa, as first suggested in the Geological 

 Magazine for 1885 by Mr. J. S. Gardner, and we gladly recognize 

 it as such, since it will do away with the necessity of registering a 

 new species. It is a highly crystalline cast, exhibiting a very de- 

 pressed spiral region, containing three gradually increasing whorls 

 separated by a rather deep suture and bordered by a subangulate 

 peripheral margin; the apex is very obtuse; aperture elongate, narrow 

 and subquadi'angular, extending beneath to the umbilical cavity, 

 which appears to be covered by an expansion of the inner lip. Diam. 7 ; 

 alt. 4"5 mm. Sowerby's type specimen of the species in the National 

 Collection is one of the largest terrestrial shells formd in British 

 Tertiary deposits; it measures 55 mm. in diameter, and is about the 

 same in elevation. 



Formation. — Oligoccne (Bembridge Beds). Localities. — Sconce and 

 Headon Hill. 



VITREA, Fitzinger, 1833. 

 ViTEEA ScoNCiENsis, n.sp. PI. VI. Fig. 13. 



Helix Sconciensis (Edwards MS.) J. S. Gardner. — Geol. Mag. 1885, 

 p. 249. R. B. Newton. — Syst. List Edwards Coll. British Museum, 

 1891, p. 271. 



Shell much depressed, orbicular, subdiscoidal and iimbilicated ; 

 volutions five ; suture deep ; spire slightly elevated ; surface orna- 

 mented with numerous closely set, raised and oblique lines, which 

 extend over the whorls to the umbilical perforation ; lip simple ; other 

 apertural characters indistinct (filled with matrix). Diam. 9 ; alt. 4 mm. 



This species approaches most closely to Helix 2)' Urbani, F. E. 

 Edwards,^ which occurs in the same beds, but we have made a 

 distinction on account of the highly ornamented condition of our 

 specimen, its much more depressed spiral region and slightly larger 

 umbilicus. Sandberger^ recognises H. If Urbani under the genus 

 Hyalinia of Charpcntier, but this name, according to the law of 

 priority, must be abandoned in favour of Fitzinger's Vitrea, the ty|)e 

 of which is Helix crydallina, Miiller. Mr. E. A. Smith gives an in- 

 teresting synonomy of these, genera in the Journ. Conchology, 1891, 

 p. 339. 



Formation. — Oligocene (Bembridge Beds). Locality. — Sconce, Isle 

 of Wight. 



VlTEEA LEIA, U.Sp. PI. VI. Fig. 14. 



Helix leia (Edwards MS.), E. B. Newton. — Syst. List Edwards 

 Coll. British Museum, 1891, p. 270. 



Shell depressed, discoidal and umbilicated ; volutions four, regularly 

 increasing, apex very obtuse ; aperture sub-ovate and extending beneath 



1 Mon. Pal. Soc. 1852, p. 62, pi. x, fig. 5, 



2 Land-u-Siissw-Conch. A'(»r\velt, 1873, p. 29-1, pi. xvii. fig. 7. 



