50 COLIMACEA. 



Sup. Trans. Newcastle Nat. Hist. Soc, p. 34 ; lb., Mag. Zool. 

 and Bot., II, p. 112; Thompson, Ann. and Mag. Nat. Hist., VI, 

 p. 40 ; Turbo sexdentatus, Montagu, Test. Brit., p. 59, f. 8 ; 

 Brown, Ency. Brit., 6th Ed., VI, p. 457; Turton, Brit. Fau., 

 p. 184; Helix minuta, Miiller, Verm., II, p. 101; Vertigo sex- 

 dentata, Brown, Illust. Conch., p. 41, pi. 14, f. 8. 



Shell subcylindrical, ventricose, subconic above, smooth, 

 glossy, of a brownish-yellow horn-colour ; spire consisting of 

 four slightly inflated volutions, terminating in a rather obtuse 

 apex ; aperture sublunate, a little margined externally ; with a 

 thin, reflexed, slightly bent outer lip, which is usually provided 

 with four teeth, two on the upper portion of the aperture, the 

 right one the larger, and two on the columellar lip. Length 

 one line ; diameter half its length. 



Found in moist situations in Cornwall, Devonshire, Suffolk, 

 at Preston, Lancashire, Newcastle-upon-Tyne, and at Ballan- 

 trae, Ayrshire. It is widely diffused throughout Ireland, 

 although rare where it is met with. 



5. Vertigo palustris, pi, V, f. 14. 



Vertigo palustris. Leach, Moll., p. 128, pi. 8, f. 10; Turton, 

 Man., p. 104; Alder, Mag. Zool. and Bot., II, p. 112; Thomp- 

 son, Ann. and Mag. Nat. Hist., VI, p. 40; Brown, Illust. 

 Conch., p. 41, pi. 18, f. 39; Alcsa palustris, Jeffreys, Linn. 

 Tr., XVI, p. 360 ; Pupa antivertigo, Drapernaud, p. 60, pi. 3, 

 f. 32, 33. 



Shell oblong-ovate, subcylindrical, of a deep chestnut, glossy 

 brown-colour ; spire subconic, composed of four volutions, 

 slightly inflated, and well defined by the sutural line ; body 

 fully longer than the spire ; aperture sublunate, with me 

 margins whitish, somewhat sinuated, and provided with eight 

 unequal teeth, three of which are situated on the outer lip, 

 -three on the superior portion of the columella, and two on the 

 columellar lip ; outer lip with a considerable subsinus near its 

 centre. 



This species has sometimes a ninth tubercular tooth. It is 

 somewhat smaller than the V. sexdentatus. 



The V. palustris may be easily distinguished by the three 

 distinct, white teeth, which are situate within the upper and 

 truncated portion of the aperture. 



Found in marshy situations, in the neighbourhood of Scar- 



