MALACOZOA. GASTEROPODA. PULMOBRANCHIATA. 91 



5. Zonites alliarius. Garlic-scented Zone-Snail. 



Shell nearly flat, being but slightly convex above, some- 

 what wrinkled, shining, transparent, yellowish-brown, of four 

 or five whorls, having the suture-margin planulate, and of 

 which the last has part of the under side somewhat opaque 

 and whitish ; the margin of the aperture forming three-fourths 

 of a circle ; the umbilicus rather large and deep. Diameter 

 about three-twelfths of an inch. 



Smaller than Zonites cellarius, and somewhat higher in 

 proportion to its breadth, and having the mouth less oblique. 

 It is also of a darker colour, and has a spiral turn less. Zonites 

 nitidulus is much less glossy, more convex above, and hav- 

 ing the suture-margin of the turns not planulate. 



The animal is black above, light grey beneath; with the 

 foot extremely compressed, and pointed behind ; the upper 

 tentacula of moderate length, claviform, and granulate ; the 

 lower very short, pale grey ; the neck transversely rugose, 

 with a median ridge and two grooves. 



When irritated, torn, or crushed, the animal emits a very 

 strong smell resembling that of garlic, which is also given 

 out on its being immersed in hot water. It ceases after death, 

 if heat has been applied. Frequently, especially in wet 

 weather, the smell of a single small specimen, on being 

 gathered, may be felt at the distance of several feet. 



Very abundant, on banks among moss, in woods, thickets, 

 among herbage, decayed leaves, and under stones, along the 

 coast and in the interior, in very dry, ordinary, and moist 

 situations. Plentiful among moss on the inner sand-hillocks of 

 the Links near Don-Mouth, on both sides, and in the Parish 

 of Belhelvie, along with Bulimus lubricus, Helix pulchella, 

 Helix Trochulus, Pupa umbilicata, and Vitrina pellucida ; also 

 at Peterhead, and about the Bay of Cruden. Abundant under 

 stones at the Bay of Nigg, Old Machar Church, and Don 

 Bridge ; about Auchmedden, Gamrie, Banff, and Turiff. Very 

 rare in the higher valleys of the interior, in Glen Tannar, for 

 example, and not occurring in heathy tracts. 



Zonites alliarius. Miller, Ann. Phil. N. S. vii. 379. — Helix 

 alliaria. Alder. Mag. Zool. and Bot. ii. 108. — Zonites alliarius. 

 Gray's Turton, 168. 



6. Zonites radidtulus. Minute Striated Zone-Snail. 

 Shell depressed, very slightly convex above, regularly 

 striate, transparent, glossy, pale greenish-grey, of three and a- 

 half whorls, which are flattened at the suture-margin, with 



