71 



Aredia vulgaris, Ehrenberg. 



— id. var. aiigulosa, Leidy. 



— discoides, Ehrenberg. Leidy. 



— hemisphaerica, Perty. 



— microstoma, mihi. 



— catinus mihi. 

 Nebela collaris, Leidy. 



— longicollis, mihi. 



— lageniformis, mihi. 



— flabellutum, Leidy. 



— bigobbosa, mihi. 



— dentistoma, mihi. 



— bursella, Vedjowsky. 

 Hyalospheuia papilio, Leidy. 

 Quadrula symmetrica, Schulze. 

 Heleopera rosea, mihi. 



— sylvatica, mihi. 

 Cryptodifflugia oviformis, mihi. 

 Pseudodifflugia hemisphaerica, mihi. 



— amphitrematoides, Archer. 



Pamphagus hyalinus, Leidy. 



— mutabilis, Bailey. 

 Plagiophrys scutiformis, Hertwig und Lesser. 



— cylindrica (?) Claparede und Lachmann. 



— gracilis, mihi. 

 Platomia . . . . ? 



Cyphoderia margaritacea, Schlumberger. 



— id. var. major, mihi. 

 Assulina semilunum, Leidy. 



'— minor, mihi. 

 Euglypha alveolata, Dujardin. 



— ciliata, Leidy. 



— strigosa, Leidy. 



— filifera, mihi. 



— cristata, Leidy. 



— compressa, Carter. 



— laevis, Perty. 



— id. var. minor, mihi. 



