ZONITES. 
97 
side of body grey ; tentacles and neck black. (^Sturm, 
1 . 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. excavatus. Excavated Snail ^ — Shell 
sub-globular, depressed, shining, transparent 
horn-colour, regularly striated; whorls 6^ 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,, MSS.,, in Alder,, Cat. 13. n. 52. ; Mag, 
Zool. and Bot, ii. 107.; Pfeiffer,, Mon. Hel.\. 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.; Forhes and 
Hanley,, B. M. iv. 40. t. 121. f. 2, 3, 4. 
Inhab. under decayed wood, and timber that has 
lain some time on the ground. 
Animal lead-coloured. 
H 
