SYSTEMATIC INDEX 



INTRODUCTIONS, NOT ESTABLISHED, BUT ItEPRE- 

 SENTED BY A FEW LIVING EXAMPLES. 



PAGE 



Fam. :CYCLOPHORID^ 346 



Genus : L Cochlostoma, Jan, 1830 . . . 346 

 (Sub-gen. : Cochlostoma, s.s.) 



1. C. septemspirale (Razoumowsky) . 346 

 (Sub-gen. : Auritus, Westerlund, 1883) 



2. C. patulum (Draparnaud) .... 347 



Fam. : P H Y S I D iE 348 



Genus: 1. Physa, Draparnaud, 1801 . . . 348 



1. P. acuta, Draparnaud 348 



2. P. gyrina, Say 349 



Fam.: PUP ILL ID ^ 349 



(Sub-fam. : GASTROCOPTIN^) .... 349 



Genus : 1. Chrondrina, Reichenbach, 1828 . 349 

 (Sect. Solatopupa, Pilsbry, 1917) 



1. C. similis (Bruguiere) 349 



(Sub-fam. : CHONDRULIN^) 350 



Genus : 2. Chondrula, Beck, 1837 . . . 350 



1. C. quadridens (Miiller) .... 351 



(Sub-fam. : PLEURODISCIN^E) .... 352 



Genus : 3. Pleurodiscus, Wenz, 1919 . . 352 



1. P. flavidus (Rossmassler) .... 352 



Fam. :ENDODONTIDiE 352 



Genus: 1. Helicodiscus, Morse, 1864 . . 352 



1. H. parallelus (Say) 352 



Fam.: ZONITID^ 353 



(Sub-fam. : ARIOPHANTIN/E) 353 



Genus: 1. Zonitoides, Lehmann, 1862 . . 353 



1. Z. minusculus (Binney) .... 353 



