COLIMACEA. 43 



VI, p. 15, pi. 23, f. 326; Bulimus muscorum, Bruguiere, Ency. 

 Meth., p. 334, No. 63 ; Helix muscorum, Miiller, Verm. Hist., 

 II, p. 105, No. 304; Turbo muscorum, Linnaeus, Syst. Nat., p. 

 1240, No. 651 ; Chemnitz, Conch., IX, pi. 3, f. 3 ; Maton and 

 Rackett, Linn. Tr., VIII, p. 182; Turton, Brit. Fau., p. 184; 

 Donovan, Brit. Sh., Ill, pi. 80 ; Pupa muscorum, Brown, lUust. 

 Conch., p. 39, pi. 14, f. 7. 



Shell subcylindrical, smooth, glossy ; body somewhat shorter 

 than the spire, which consists of four rather broad volutions, 

 gradually tapering to a somewhat obtuse apex ; aperture sub- 

 ovate, destitute of teeth ; outer lip white, rather narrow above, 

 but widening a little below; pillar lip narrow ; whole surface of 

 a fulvous brown-colour. 



Found at the Rabbit Burrow, Portmarnock, Ireland; near 

 Weymouth, Dorsetshire; at Corstorphin Hill, near Edinburgh, 

 and in the park of the Earl of Rothes, near Leslie, Fifeshire, 

 on the bark of trees and among moss. 



This seems the true P. muscorum of Linnaeus; and I 

 cannot agree with Rossmassler and other modern authors, in 

 considering the P. unidentata and hidentata as varieties of this 

 species. 



2. Pupa unidentata, pi. V, f. 2. 



Pupa unidentata, Pfeiffer, Land un Was. Sn., I, p. 58, pi. 3, 

 f. 19, 20; Brown, Illust. Conch., p. 39, pi. 14, f. 4; lb.. First 

 Ed., pi. 41, f. 4 ; Pupa muscorum, Giirt, Conchyl. der Wette- 

 rau, S. 20 ; Rossmassler, I, p. 83, pi. 2, f. 37 ; Turho musco- 

 rum, V. Alten, Erd-und Flussconchyl., un Augsb., S. 23. 



Shell smooth, brownish horn-coloured, subcylindrical ; con- 

 sisting of seven narrow, slightly inflated volutions, terminating 

 in an obtuse apex; aperture suborbicular, sublunate above, with 

 a single sharp, prominent tooth placed on the base of the body, 

 margins white and smooth. Length a little more than an eighth 

 of an inch ; diameter a third of its length. 



Distinguished from P. marginata by the single tooth being 

 more acute, and placed farther forward. 



Found with other species of Pupa at Portmarnock Rabbit 

 Burrow, Ireland. 



3. Pupa bidentata, pi. V, f. 3. 



Pupa hidentata, Pfeiffer, I, p. 59, pi. 3, f. 21, 22; Brown, 

 Illust. Conch., p. 39, pi. 14, f. 6 ; lb., First Ed., pi. 41, f. 6. 



