COLIMACEA. 67 



Shell thin, pellucid, of a rufous horn-colour ; body large, 

 considerably inflated in the centre ; spire small, subdepressed, 

 consisting of four or five very narrow volutions; aperture semi- 

 lunar, its breadth and length nearly equal ; outer lip very thin, 

 but not reflected; columellar lip a little reflected over the very 

 minute perforation, instead of an umbilicus. Diameter about 

 three-eighths of an inch ; its height seldom exceeding a quarter 

 of an inch. 



Found in woody, damp situations, and is a very local and 

 scarce species in England. It has been met with generally 

 throughout Ireland, except in the King's County. My friend 

 T. W. Warren, Esq., of Dublin, met with it at Kilruddery, 

 Wicklow; by Edward Wallen, Esq., at Altadawan, Tyrone; by 

 Miss Mary Ball, of Dublin, at Youngrove, near Youghal ; by 

 the Rev. Benjamin J. Clarke at Monivea, Galway ; by W. H. 

 Harvey, Esq., near Limerick ; and in glens in the Belfast 

 mountains by William Thompson, Esq., of Belfast. 



16. Helix lamellata, pi. VII, f. 21. 



Helix lamellata, Jeffreys, Linn. Tr., XVI, p. 333 ; Thomp- 

 son, Ann. and Mag. Nat. Hist., VI, p. 26 ; Brown, lUust. 

 Conch., p. 47, pi. 18, f. 47; Helix Scarhurgensis, Turton, 

 Man., p. 62, f. 48. 



Shell trochiform, semipellucld, of a pale grayish horn-colour; 

 body somewhat longer than the spire, which consists of five 

 gradually decreasing, well defined volutions, terminating in a 

 somewhat obtuse apex ; outer lip thin ; inner lip slightly re- 

 flected over the umbilicus; aperture sublunate, wider than long; 

 base of the body tumid, generally of a paler colour than the 

 superior portion of the shell, and provided with a small, but 

 deep umbilicus; whole surface covered with an epidermis, which 

 rises into a series of longitudinal, lamellated processes. Dia- 

 meter about the tenth of an inch. 



This species has somewhat the appearance of H. aculeata, 

 but may be distinguished by the lamellar epidermis not rising 

 into spinous processes, and in being more numerous ; the spire 

 also is pyramidal, and not conical, as in H. aculeata ; the aper- 

 ture in the latter species is more elliptical and produced, than 

 in H. lamellata, and it is destitute of the internal marginal rib. 

 Mr. Thompson says, that both the animal and shell are of a 

 paler colour in the young, than in the adult state. 



