COLIMACEA. 45 



defined by the sutural line, and terminating in an obtuse apex ; 

 aperture nearly orbicular, with a single, small, tubercular tooth, 

 situate far back, at the central part of the aperture, on the 

 front of the body volution ; lips white, continuous, with a whitish 

 rib placed externally behind the outer lip, but which is nearly 

 obsolete in some specimens ; lip thin and emarginate, slightly 

 reflected, with a small subumbilicus placed behind it. Length 

 somewhat more than an eighth of an inch; diameter about a 

 third its length. 



This species is pretty generally dififused throughout Great 

 Britain and Ireland, inhabiting mossy banks or under stones, in 

 the crevices of rocks or on old walls ; and also under the bark 

 on decayed trees. 



Found at Castletown, Isle of Man, by my friend Edward 

 Forbes, jun., Esq. 



5. Pupa umbilicata, pi. V, f. 6. 



Pupa umbilicata, Drapernaud, p. 62, pi. 3, f. 39, 40 ; 

 Lamarck, An. San. Vert., VI, pt. 2nd, p. Ill; Jeffreys, Linn. 

 Tr., XVI, p. 357 ; Rossmassler, pi. 23, f. 327 ; Alder, Mag. 

 Zool. and Bot., II, p. 1 1 1 ; Thompson, Ann. and Mag. Nat. 

 Hist., VI, p. 37; Pupa muscorum, Fleming, Brit. An., p. 268; 

 Pupilla Drapernaudii, Leach, Moll., p. 126; Turbo musco- 

 rum, Montagu, Test. Brit., p. 335, pi. 22, f. 3 ; Brown, Ency. 

 Brit., 6th Ed., VI, p. 457 ; Helix umbilicata, Daudeb, Hist, 

 des Moll., No. 474 ; Odostomia muscorum, Fleming, Edin. 

 Ency., VII, p. 76 ; Jaminia muscorum, Risso, E. M., IV, p. 

 88; Pupa umbilicata, Brown, lUust. Conch., p. 40, pi. 14, f. 5; 

 lb., First Ed., pi. 41, f. 5. 



Shell cylindrical, ventricose, smooth, subpellucid, glossy, pale 

 brownish horn-colour ; body and spire nearly of equal length, 

 the latter consisting of five or six narrow, considerably inflated 

 volutions, terminating in a subacute apex ; aperture elongated, 

 subluniform ; outer and pillar lips rather broad, white, and 

 slightly reflexed, with a single, large, laminar tooth at the supe- 

 rior outer angle of the aperture, and appears to be formed by 

 an inflected prolongation of the outer lip ; behind the columel- 

 lar lip is a rather large umbilicus, bounded by a circular rib. 

 Length somewhat more than the eighth of an inch ; diameter 

 about a third of its length. 



