202 



Genus 1. CLAUSILIA, Braparnaud. 



Animal ; short, usually broad, obtuse behind, with stout clavate 

 upper tentacida, and very small lower ones. — Forbes. 



Shell ; elongately turreted, sinistral, contracted at the last whorl, 

 aperture pyriformly ovate, furnished with tooth-like plaits, and 

 a small elastic shelly bone attached to the columella. 



The Clausilia are a numerous tribe, of limited range, inhabiting old 

 walls and trunks of trees, or under stones among dead leaves, chiefly in 

 the south-eastern parts of Europe, and all producing a horny, turriculated 

 shell, some of whch are finely ribbed throughout. The chief peculiarity 

 of the genus, as its name denotes, consists in the animal having the fa- 

 culty of closing itself in the shell by means of an elastic bony appendage 

 attached to the columella, and this appendage is not present, like an oper- 

 culum, during the growth of the animal, but is formed only at maturity. 

 Another peculiarity is that the shells are reversed, the whorls being convo- 

 luted to the left, and a little contracted towards the aperture. The margin 

 of the aperture is continuous, and often conspicuously reflected, and within, 

 on the columella side, are usually two tooth-like plaits with often smaller 

 internal ones. 



In the list of species which follows are included thirteen, supposed to 

 be destitute of the bony appendage, and separated, for this reason, under 

 the name of BaJea. 



1. abrupta, Kiist. 



2. acridula, Zieg. 



3. aculus, Benson. 



4. aguata, Partsck. 



5. albescens, Menke. 



6. albida, Parr. 



7. albocineta, Pfr. 



8. alboguttulata, Wagn. 



9. Almissana, Kiist. 



10. Anatolica, Roth. 



11. Antigua, Schiibl. 



12. aquila, Parr. 



13. arinata, Kutsch. 



14. australis, Forbes. 



15. badia, Zieg. 



16. Balsamoi, Strob. 



17. Belcheri, Pfr. 



Species. 



18. Bergeri, Mayer. 



19. bicarinata, Zieg. 



20. bicolor, Pfr. 



21. bicristata, Friv. 



22. bidens, I Ann. 



23. Bielzii, Parr. 



24. bigibbosa, Clip. 



25. bilabiata, Wagn. 



26. binotata, Zieg. 



27. biplicata, Mont. 



28. blanda, Zieg. 



29. Boissieri, Chp. 



30. Bourcieri, Pfr. 



31. Brauni, Clip. 



32. Brembina, Strob. 



33. brevicollis, Pfr. 

 .34. brunnea, Zieg. 



35. bulimoides, Br aim. 



36. Buschii, Kiist. 



37. cserulea, Fir. 



38. CalcavtB, Phil. 



39. Campanica, Mich. 



40. canaliculata, Pfr. 



41. canalifera, Rossm. 



42. Candida, Pfr. 



43. candidescens, Zieg. 



44. Cantrainei, Desh. 



45. capillacea, Rossm. 



46. carissiraa, Zieg. 



47. Cattaroensis, id. 



48. Cecillei, Phil. 



49. Charpentieri, Pfr. 



50. Chinensis, id. 



51. chondriformis, Jan. 



