FAMILY C0L1MACEA. 39 



There is a small genus of seven or eight species inhabiting some 

 parts of Germany, Switzerland, North Italy, Sicily, and Syria, 

 Daudebardia, which comes nearer than Vitrina to Testacella, but is 

 more removed from the Limax type. It has no shield, and the 

 pulmonary sac is at the posterior extremity of the body, covered by 

 a little spiral Vitrina-like shell. 



The only British species of Vitrina is — 



1. pellucida. Shell of three imperforate, pellucid whorls. 



1. Vitrina pellucida. Transparent Vitrina. 



Shell ; imperforate, depressly globose, thin, transparent, glassy, 

 greenish or yellowish, whorls three to 

 three and a half, rapidly increasing, moder- 

 ately convex, smooth, shining, spire scarcely 

 raised, suture indicated by a fine thread- 

 line ; aperture obliquely ovate, large, lip 

 simple, columella thin, excavately in- 

 curved. 



Helix pellucida, Muller (1774), Verm. Hist. vol. ii. p. 15. 



Helix diaphana, Poiret (1801), Coq de VAisne,Prod. p. 77. 



Helicolimax pellucida, Ferussac (1801), Syst. Conch. -p. 30. 



Helix limacoides, Alton (1812), Syst. Alhandl. p. 85, pi. xi. f. 20. 



Vitrina pellucida, Geertner (1813), Conch. Wett.ip.34, (not of Draparnaud) . 



Helix elliptica, Brown (1815), Mem. Werner. Soc. vol. ii. part ii. p. 525. 

 pi. 24. f. 8. 



Hyalina pellucida, Studer (1820), Kurz. Verzeichn. p. 86. 



Limacina pellucida, Hartmann (1821), Syst. Gasterop. p. 54. 



Vitrina beryllina, C. Pfeiffer (1821), Beutschl. Moll. p. 47. pi. 3. f. 1. 



Vitrina Mulleri and Dillwynii, Jeffreys (1830), Trans. Linn. Soc. vol. xvi. 

 p. 506. 



Hob. Northern and Central Europe, scarcer towards the South. (Under 

 stones, leaves, or moss.) 



The Vitrina of the British Isles has been described as three species, 

 all certainly referable to one, the Helix pellucida of Midler, which, 

 it may be observed by our synonyms, is not the Vitrina pellucida of 

 Draparnaud. The animal varies from grey to ochraceous, but very 

 pale, with a tinge of flesh colour. Two transparent violet-grey lines 

 pass from the tentacles along the neck, and a transparent line be- 

 tween two darker lines may be observed at the side of the foot. 



