518.?Lituus, Martyn, 1784; Humph. 1797 ; not Breyn. 1732. L. 

 brevis. 



519. Cyclophorus, Montf. 1810. Cyclopliora, Swains. 1840. An- 

 nularia a, Schum. 1817. 



520. Cyclotus, Guild., Stvains. 1840. Cycl. planorbutus. 

 521.Myxostoma, TroscAeZ, 1847. Cyc. Petiverianus. 



522. Pterocyclos, Benson, 1835. Spiraculum, Pearson, 1835. Pt. 

 bilabiatus. 



523. Farcimen, Troschel, 1847. Cycl. Tortą. 



524. Megalomastoma, Guild., Stoains. 1840. Cyclos. flavulum. 



525. Realia, Gray, 1840. R. ? n. s. 



526. CalUa, Gray, 1840 ; 1844, 72. C. ? n. s. 



527. Pupina, F/^nart?, 1829?; Gray, 1844. Pupina Keraudrenii. 

 Moulinsia, Gratelonp, 1840. Pupina, sp. G. Sow. 1841. M. 



Nunezii. 



528. Registoma, Hasselt, 1824. Reg. \4treum. 



529. Pomatias, Hartm. 1821. Cyclostoma, sp. Lam. Cy. patula. 



530. ? Ferussina, Grateloup, 1826. Ferussacia, Lefroy, 1828; not 



ižmo, 1826. Strophostoma, Desh. 182/. Anastoma, sp. 1 



F. anastomseformis. 



Fam. XI. OLIGYRAD.E. 



531. Oligyra, Say, 183 ? Helicina /5, ^/amy. 1825. O. orbiculata. 

 Helicina, Lam. 1822 (not 1801) ; not Montf. Hel. neritella. 

 Pachystoma, Sivains. 1840. P. occidentalis. 



Trociiatella, Sivains. 1840. H. pulchella. 

 Ampullina, Blainv. 1825. A. striata. 

 Oligyra, Stvains. 1840. H. rbodostoma. 



532. Lucidella, Stvains. 1840. H. aiireola, 

 Helix, sp. Fe'nts. Helicina, sp. Gray. 



533. Alcadia, Gray, 1840. Helicina, Stvains. 1840. H. major. 



Fam. XII. PROSERPINID^. 



534. Proserpina, Gray, 1840 (Procerpena misprini). Odontostoma, 

 D'Orb. 1842. P. linguifera. 



