LAND REGIONS. 



181 



America. 



Strebelia. 



Streptost^da. 



Selenites. 



Guestieria. 



Stenopiis. 



Sagda. 



Binneya. 



Pallifera. 



Anostoma. 



Bulimus. 



Oclontostomns. 



Liguus. 



Ortbalicus. 



Cylindrella. 



Macroceramus. 



Megaspira. 



Strophia. 



Berendtia. 



Eucalodinm. 



Rhodea. 



Simpulopsis. 



Gaeotis. 



Peltella. 



Amphibnlima. 



Homalonyx. 



Old AVoeld. 



Daudebardia. 



Testacella. 



Ennea. 



Gonospira. 



Gibbus. 



Parixiacella. 



Hyalimax. 



Geomalacus. 



Nanina. 



Parmarion. 



HelicarioB. 



Boj^sia. 



H3'pselostoma. 



Achatina. 



Pseudachatina. 



Limicolaria. 



Columna. 



Bulinns. 



Cataulus. 



Pterocyclos. 



Pomatias. 



Otopoma. 



Craspedopoma. 



Diplommatina. 



Aulopoma. 



America. 



Tomocyclus. 



Choanopoma. 



Cistula. 



Geomelania. 



Trochatella. 



Alcadia. 



Lucidella. 



Bourcieria. 



StoastOBia. 



Proserpina. 



Ceres. 



Chilina. 



Pompholyx. 



Pach3-chilus. 



Pleurocera. 



Goniobasis. 



Anculotus. 



lo. 



Tulotoma. 



Melantho. 



Lioplax. 



Mulleria. 



Castalia. 



Monocondylus. 



Rangia. 



Old World. 



Leptopoma. 



Pupina. 



Gallia. 



Alycaeus. 



Acme. 



Pirena. 



Vibes. 



Melanopsis. 



Canidia. 



Paludomus. 



Lithogiyphus. 



Lacunopsis. 



Benedictia. 



Baikalia. 



Lanistes. 



Navicella. 



JEtheria. 



Iridina. 



Spatha. 



Galathea. 



Yelorita. 



Batissa. 



Fischeria. 



Cyrenella. 



Glaiiconomya. 



Oceanica contains comparatively few peculiar generic types. 

 The following may be cited : 



Athoracophorus. 



Rhytida. 



Diplomphalus. 



Placostylus. 



Partula. 



Carelia. 

 Achatinella. 

 Auriculella. 

 Endodonta. 



Paryphanta. 

 Ameria. 

 Latia. 

 Ampvillacera. 



The malacological fauna of Oceanica is not intermediate in 

 character between those of the Old and New Worlds ; it has a 

 distinct series of forms, nearest allied, however, to those of Asia, 

 to which it approaches through the Malaysian Islands. 



Woodward has adopted for the land regions the principal 

 Botanical Regions, 27 in number, of Prof. Schouw, as given in 

 Berghaus' Physical Atlas : they are mostly natural regions for 

 the terrestrial mollusks, but several of them are not in accord- 

 ance with the actual grouping of the species. Fischer has 

 attempted in several instances to improve upon Woodward's 

 divisions ; successfully on the whole, although some of his 

 regions, do not, we think, possess distinctive characters. 



