93 



XVI. CYCLOSTOMA. 



Shell oval or oblong, not clothed with an epidermis : 

 aperture circular or nearly so, without teeth ; the 

 peritreme united all round : operculum horny, 

 marked with a single depressed spiral line. 



This genus is distinguished from the Paludina in 

 having only a single spiral line on the lid ; from 

 the Fakata in wanting an epidermis ; and from 

 both in being a land shell, and never found im- 

 mersed in water. 



75. Cyclostoma elegans. Shell conic-oval, with 

 raised spiral striae ; and the peritreme attached at 

 its upper part. 



Cyclostoma elegans. Drap. p. 32. t. 1./. 5 — 8. 



_ Brard,p. 103. t. 3./. 7, 8. 



Cyclostomus elegans. De Montfort, ii. p. 287. 

 Turbo elegans. Mont. p. 342. t. 22. f. 7. 

 Turbo striatus. Da Costa, p. 86. t. 5./. 9. 



Shell half an inch long, and four tenths of an inch 

 wide, sohd, grey or purplish-yellow, mostly purple 



