24 LIST OF MOLLUSC' A. 



Rissoa vitrea Mont. 

 Kissoa pulclierrima Jeff. 

 Kissoa f ulpida Adams 



v. pallida 

 Eissoa soluta Phil. 



v. Aldori 

 v Rissoa semistriata Mont. 



v. pura 



fr Rissoa congillus Mont, 

 v. rupestvis 



HYDROBIA Hartni. 

 ^flydrobia ulvcc reiiu. 

 v. 1 albida 

 v. 2 Barleci 

 v. 3 octona 



HETEROPHROSYNID^E Clark 



BABLEEIA Clark 

 . Barleeia rubra Mont. 

 v. 1 unifasciata 

 v. 2 pallida 



JEFFREYSIA Aider 

 Jeffreysia diaphana Alder 

 Jeffreysiaopalina Jeff. 

 Jeffreysia globularis J^ff. 



SKENEID^ Clark. 



SKEN^A Fleni. 

 Rkenea planorbis Fabr. 

 v. 1 trochifonnis 

 v. 2 maculata 

 v. 3 hyalina 



