ZONITES. 171 



This exquisite little shell was first noticed as British 

 by Dr. Gray in the ^ Medical Repository ^ for 1821. 



B. Shell conical, having a sHght depression and perforation 



instead of an nmbilicus. 



9. Z. FULvus* Miiller. 



Helix fulva, Miill. Yerm. Hist. pt. ii. p. 56 ; F. & H. iv. p. 75, pi. cxviii. 

 f. 8, 9. 



Body dark-grey or slate- colonr, with very fine black specks : 

 tentacles very long; bulbs globnlar: foot rounded in front, 

 pointed and keeled behind, having some scattered milk-white 

 specks on the sole or under part. 



Shell pyramidal, thin, glossy and semitransparent, horn- 

 colour or tawny, finely but irregularly striate in the line of 

 growth, and marked spirally with close microscopical hues, 

 which are more distinct and regular at the base : epidermis 

 very thin : wliorls 5 \, cylindrical, increasing gradually in size : 

 periphery obtusely keeled : spire very prominent, but blunt : 

 suture deep : mouth semilunar, compressed and narrow : outer 

 lip curved, but not oblique, refiected on the pillar : umhilicus 

 consisting of a slight indentation, with sometimes a small hole. 

 L. 0-1. B. 0-1. 



Var. Mortoni. Shell of a paler colour, with the spire more 

 depressed and peripheral keel sharper. Helix Moi'toni, Jeffr. 

 in Linn. Trans, xvi. p. 332. 



Habitat : Under decayed wood, leaves, and stones in 

 shady woods and marshy places, from the Moray Firth 

 district to the South of England, as well as all over Ire- 

 land. Specimens collected in dry situations are much 

 larger than those which are found in wet moss. The 

 variety is from Somerset and North Hants. This species 

 is one of our upper tertiary fossils. Its foreign range 

 extends from Siberia to Sicily, as weU as to the Azores. 

 According to Philippi, it is the same species as the Helix 



* Tawiiy. 



I 2 



