606 PLIOCENE MOLLUSCA. 



1893—98. Jefreysla globularls, A. Bell, Proc. Roy. Irish Acad. [3], vol. ii, p. 629, 1893 ; Trans. Roy. 



Geol. Soc. Cornwall, vol. xii, p. 149, 1898. 

 1901. Jeffreysia globularis, Concli. Soc. List, Journ. of Concb., vol. x, p. 18, uo. 364. 



Specific Characters. — Shell miiinte, thin, obliquely orbicular; whorls 3, tumid, 

 the last much the largest, three-fourths the total length ; spire very short, 

 compressed; apex blunt; suture deep; mouth oval, half the length of the shell, 

 expanded; outer lip incurved al)ove, rounded below ; inner lip separated from the 

 pillar ; peristome entire, distinct ; umbilicus deep. 



Dimensions. — L. 1 — 2 mm. B. 1 — 2 mm. 



Distribution. — Recent : Skye, Slietlands, English Channel (TiOcard), Norwegian 

 coast, Finmark. 



Fossil : St. Erth. 



Uema.ylcs. — The specimen of /. cjlohuhiris here figured is from the Wood Collec- 

 tion at the British Museum, and is probably the one reported by Messrs. Kendall 

 and R. Gr. Bell in their paper of 1886. 



Genus ALVANIA, Risso, 1826. 

 Alvania Whitleyi (A. Bell). Plate L, fig. 40. 



1898. Rlssoa Whitleiji, A. Bell, Trans. Roy. Greol. Soc. Cornwall, vol. xii, p. 163. 



8pecifi,c Characters. — Shell minute, rather solid ; whorls 6 — 7, convex, obtusely 

 subangulate in the centre; ornamented by about 12 strongly-marked rounded 

 costse which do not reach the base ; crossed l)y fine, conspicuous spiral ridges ; 

 spire short, rapidly and regularly diminishing to a rounded apex ; suture deep ; 

 mouth short, oval, angulated above ; outer lip thickened by the labial rib. 



Dimensions. — L. 2 mm. B. 1 mm. 



Distribution. — Not known living. 

 Fossil : St. Erth. 



Remarlrs. — The present specimen, which belongs to the British Museum, was 

 found by Mr. A. Bell in some unexamined material left at his brother's death. 

 He described it as a new species, remarking that it was nearly allied to a Miocene 

 fossil, the Bissoa clotho of Homes, with which at first we were disposed to associate 

 it, as a closely-related, variety.^ On further comparison with Homes' figure, how- 

 ever, we now prefer to regard it as specifically distinct, both from that species or 

 from any other with which we are ac({uainted. It is a beautiful shell and quite 

 fresh and perfect. 



1 Foss. Moll. Tert.. Wien, vol i, p. 574, pi. xlviii, p. 20. 



