OF CONCHOLOGY. 109 



UNIVALVE SHELLS. 



Fig. 7th.~VOLUTA OLIVA. Shell 

 smooth and glossy; spire reflected 

 at the base ; pillar with four plaits ; 

 clouded, or covered with zigzag or 

 waved lines of a pale brown colour. 

 Found in the Indian seas, in endless 

 varieties of colours and markings. 



Linn. Syst. Naturae, vol. ii. page 

 1188. Turton's Linn&, vol. iv. page 

 326. 



A Apex, / front, N outer lip, Z 

 plaits of the pillar lip or columella. 



Fig 8th.-- HELIX V1VIPARA. 

 Shell with six ventricose whorls, sepa- 

 rated by a deep depressed line, sub- 

 ovate and obtuse, of an olive-green, 

 with generally three fasci or bands 

 on the body of the shell, and two on 

 the superior volutions, which become 

 obscure in the fourth, slightly wrinkled 

 transversely : aperture sub-orbicular ; 



