ZONITES. 97 



side of body grey ; tentacles and neck black. (^Sturm, 

 t. 11.) 



The shell appears dark chocolate when the animal 

 is alive, and is about a quarter of an inch Fig. 33. 

 in diameter. It differs from Z. cellaria, Z. 

 alliaria, and Z. nitidula in being more con- 

 vex, more regularly striated, of a darker ^^ 

 colour, and without any trace of opacity on ^*^^ 

 the under side. 



Nilson describes the eggs as depressed, globose, 

 covered with a white calcareous shell. They are 

 solitary, and deposited in May or June. This snail 

 is sometimes so abundant in pine-beds and orchideous 

 houses as to be a great detriment to the plant ; hence 

 they have been called Pine Snails and Orchideous 

 Snails. 



31. 7. ZoNiTES excawa^M*. Excavated Snail. — Shell 

 sub-globular, depressed, shining, transparent 

 horn-colour, regularly striated; whorls 5^ or 

 6, rather rounded and closely set; base much 

 rounded, umbilicus very large and deep, exposing 

 all the whorls to the tip ; aperture nearly orbi- 

 cular lunate, (t. 4. f. 39., t. 12. f. 138.) 



Helix excavata. Bean., AISS., in Alder, Cat 13. n. 52. ; Mag. 

 Zool. and Bot. ii. 107.; Pfeiffer, Mon. Hel. i. 98. —Helix 

 lucida var. Turton, Man. ed. 1. 57. t. 4. f. 39. — Helix 

 nitida a. Jeffreys, Linn. Trans, xiii. 339. 511. — Zonites 

 excavatus. Gray, Man. 175. t. 12. f. 138.; Forbes and 

 Hanley, B. M. iv. 40. t. 121. f. 2, 3, 4. 



Inliab. under decayed wood, and timber that has 

 lain some time on the ground. 

 Animal lead-coloured. 



H 



