— 348 — 



Cyclostonia Bosc 1802. Hist. nat. d. Vers ' teste Blainv. 

 Diet. sc. nat. toiP 12. p. 297. 

 = Scalaria Lamck. 

 Cyclostoma 8chlm. I8t7. Ess. p. 196. Conf. praec. etSca- 

 laria Schiim. 

 = Scalaria spec. Lanick. Typus: Turbo clathrus 

 Linn. 



Cyclostoiiiacea Mk!st<e 1830. Syn. ed. 2a p. 39. 



Etym. Cyclostoma. 



Altera familia Coelopnoorum operculatorum, Unicum 

 genus: Cyclostoma. 

 = Turhicina Feruss. 



Cydostoniacea Anton 1839. Verz. p. XIII. 52. 



Familia Gasteropodum. Genera: Littorina, Heliclna, 

 Cyclostoma. 

 Cyclostomacea L, Pffiff. 1841. Symb. Hist. Helic. L p. 4. 

 Altera ramilia Coelopnoorum operculatorum. Ge- 

 nera : Cyclostoma, Steganostoma, Acme, Trun- 

 catella. 

 Similiter Reeve 1842. Conch. syst. IL p. 90. Ge- 

 nera: Pupina, Truncatella, Cyclostoma, Helicina. 

 Catlow ^845. Conch. INomencI. p. 168. 

 L. Pfeiff. 1846 in Chemn. Conch. ed, 2a I. 19. p. 7. 

 — Genera: Cyclostoma, Pterocyclos, Pupina, 

 Acicula, Geomelania? et Truncatella? 

 Cyclostomiatae Menke olim 1828. Syn. p. 22. 

 Etym. Cyclostoma. 



Altera familia Coelopneumonatorum operculatorum. 

 Unicum genus : Cyclostoma. 

 = Turbicina Feruss. 



Cyclostomidae Gray 1840 in Turtou Man. ed. 2a p. 102. 



273. (praec. D'Orb. 1837. Moll. Canar. * teste 



Agass. Nom.) 

 Etym. praec. 



Familia Pneumonobranchiorum operculatorum. 

 ThompsoiN 1840. Moll. of Irel. p. 37. 



