INTRODUCTION. 5 



1. TESTACELLA Maugei, t. 3. f. 18. 



Testacellus Maugei Fermsac, Turton, Man. ed. 1. 



27. f. 18. 



Testacella haliotidea Drap. 18. f. 4648. 

 Testacellus europaeus Montfort, ii. 95. 



A native of Teneriffe. 



First noticed as having been introduced into this 

 country by Ferussac, and then by Miller of Bristol. 



2. BULIMUS decollatusi t. 6. f. 6. 

 Helix decollata Linn. s. n. 1247. 



Bulimus decollatus Drap. 76. t. 4. f. 27, 28. ; Tvrtov. 



Man. ed. 1. 77. f. 5. ; Eossm. Icon. f. 384. 



A native of France. 



Dr. Turton gives the following account of the 

 reason why he included this shell in the British 

 Fauna. It " was observed to breed in great abun- 

 dance for many successive years in the green-house 

 at Wotton, in South Devon, the seat of H. Studdy, 

 Esq., lodged in the earth, under the woodwork, 

 whence they wandered abroad in the summer. 

 This woodwork and the earth were replaced with 

 stone, by which the colony was lost." Zool. Journ. 

 565., and Man. ed. 1. 77; where, he adds, "no fo- 

 reign earth was ever known to have been admitted 

 into the house ; and they were considered by the 

 gardeners as natives. All that were preserved we 

 owe to the diligence of Mrs. Griffiths and Miss Hill." 



The nucleus or newly-hatched shell is small, 

 subglobose, and formed of 2^ whorls. The ani- 

 mal elongates the shell without enlarging the size 

 of the whorls, until it has perfected 6 or 8 whorls ; 

 it then gradually enlarges the whorls, and rather 

 B 3 



