PHYSA. 



257 



Philippines, and are tolerably numerous in species; extinct 

 examples occur in the Wealden of Britain and France. 



Species of Physa. 



acuta, Drop. 

 ancillaria, Say. 

 Australiana, Conr. 

 Buschii, Kiist. 

 castanea, Lam. 

 Charpentieri, Kiist. 

 concolor, Hald. 

 crassula, Dillw. 

 foutiualis, Linn. 

 fragilis, Migh. and Adams. 

 Georgiana, Quoy. 

 gibbosa, Gould. 

 . gyrina, Say. 

 heterostropha, Say. 

 Jamaicensis, C. B. Adams. 

 Ludivigi, Krauss. 

 Mollucceusis, Less. 

 Natalensis, Krauss. 

 Novae Hollandise, Krauss. 

 osculans, Hald. 

 pectorosa, Conr. 



purnila, Conr. 

 reticulata, Gould. 

 Salleana, Dkr. 

 scalaris, Dkr. 

 Senegalensis, Miill. 

 semiplicata, Kiist. 

 sinuata, Gould. 

 solida, Phil. 

 Sowerbyaua, D'Orb. 

 spiculata, Morel. 

 striata, D'Orb. 

 subarata, Mke. 

 subopaca, Lam. 

 tabulata, Gould. 

 Tongana, Quoy. 

 variabilis, Gray. 

 Venetzi, Char}). 

 venustula, Gould. 

 vinosa, Gould. 

 virginea, Gould. 



Sub-gen. phtsella, Haldeman. 



Shell globose, spire short; aperture elongate, very wide; 

 columella with the fold well marked. 



globosa, Hald. 



