— 696 — 



TlUorlta (Gray) Griff. 1834. Anim. Kingd. Moll. (ab. 31. 



vid Velorila. 

 Vis Griff. et PiDG. 1834. Cuv. An. Kingd. XII. p. 197. etc. 

 Etym. Voc. Gall. 

 = Terebra Ad. 

 Tltrea Fitz. 1833. Verz. p. 99. 

 Etym. Noin. adject. 



Genus Ilelicoideorum. Typus: Helix Iiyalina Fer. 

 = Hyalinia Ag. 

 Vitrella Swains. 1840. Malac. p. 360. 

 Etym. Vitrum. 



Subgenus BuUae. Typus: Bulla akera Gmel. 

 Synon. Akera Brown. 

 Titriiia Drap. 1801. Tabl. p. 33. 98. et 1805. Hist. p. 23. 

 30. 119. 

 Etym. Vitrum. 

 Ab Helice segregatum genus. Typus: Helix pellu- 



cida M. 

 RoissY 1805. Moll. V. p. 391. 

 Lamck. 1809. Phil. zool. et 1822. Hist. VI. 2. p. 62. 



(ed. 2a VII. p. 726.) — genus Limaceorum. 

 Cuv. 1812. Ann. du Mus. XIX. * et 1817. R. a. II. 

 p. 405. — subgenus Ilelicis. 

 Pariter Schweigg. 1820. Naturg. p. 743. 



Cuv. 1830. R. a. ed. 2a. (ed. Voigt. III. p. 74.) 

 — subdivlsiones : Vitrina, Helicophanta. 

 GoLDF. 1820. Zool. p. 661. — in Pulmobranchiis. 

 Gray 1821. Lond. Med. Rep. XV. p. 231. — genus 



Adelopneumonum terrestrium. 

 G. B. Sow. 1822. Gen. Sh. fasc. 11. * 

 Latr. 1825. Fam. nat. — genus Geocochlidum. 

 C. Pfr. 1828. Naturg. III. p. 3. — genus Coch- 

 learum. 



Pariter Rang 1829. Man. p. 157. 

 PoT. et MicH. 1838. Gal. I. p. 64. 

 Flem. 1828. Hist. Br. An. p. 265. 267. — genus Hc- 

 licidarum. 



