270 



INDEX TO GENERA. 



Nummulina, 168, 199. 

 Ophiogyra=Polygyratia, 111 

 Pararhytida, 18, 95. 

 Paryphanta, 261, 265. 

 Patera Mesodon, 113. 

 Patula, 15, 19, 266. 

 Patulastra Punctum, 15. 

 Pelia, 19, 102. 

 Pella, 19, 103, 267. 

 Petasia, 167, 170. 

 Phasis=Pella, 19. 

 Phryxgnathus Punctum, 15, 

 Pitys=Endodonta, 17. 

 Planogyra, 15, 28. 

 Plectopylis, 114, 159. 

 Poecilozonites, 19, 95, 267. 

 Polygyra, 111, 124, 128. 

 Polygyratia, 111, 124, 268. 

 Polygyrella, 111, 129. 

 Pristina Anceyia, 102. 

 Punctum, 15, 28, 263. 

 Pyramidula, 16, 51. 

 Khyssota, 261, 264. 

 Sagda, 5. 



Satsuma, 168, 217. 

 Sculptaria, 112, 138. 

 Sheldonia, 267, 

 Spelseodiscus Punctum, 30. 



Sphincterochila, 262. 

 Stenostoma=Stenotrema, 112. 

 Stenotrema, 112, 139. 

 Stephanoda^Amphidoxa, 16, 47. 

 Strobila, 112, 138. 

 Systrophia Polygyratia, 111, 

 Tetrodontina Metodontia, 149. 

 Theba, 168. 



Thera=Thysanota, 18, 95. 

 Thysanophora, 16, 50. 

 Thysanota, 18, 93. 

 37.Trichia, 167, 172,268. 

 Trichodiscus, 16, 49. 

 Trigonostoma, 110, 115, 267. 

 Triodopsis, 112, 143. 

 Trochiscus, 167, 171. 

 Trochomorpha, 18, 72, 267. 

 Trochomorphoides Trochomor- 



pha, 18. 



Ulostoma, 113, 155. 

 Vallonia, 166, 169. 

 Videna, 18, 82, 264, 267. 

 Vortex^Trigonostoma, 111. 

 Xerophila, 168, 223. 

 Xolotrema, 113, 147. 

 Zenobia, 167, 186. 

 Zoogenites=Acanthinula, 17, 54. 



