[ 24] 



Inopercalates, 



•< 



o 



i 



e 



i 



1 

 a 



i 



i 



•< 



d 

 o 



« 



e 



>-> 



d, 



1 



2 



o 



Or 



s 



3 



Helix ^ 



150 



38 



23 



141 



101 



94 



3G 



29 



27 



StreptaxiSy 









19 











1 



BuUmus, 



23 



39 



32 



473 



30 



18 



11 



25 



21 



Spiraxis^ 





24 



7 



6 



5 



7 



3 







Orthalicus^ 



1 



4 



2 



18 



1 



1 







2 



Achatina, 



2 



7 



3 



7 



16 



19 



3 



3 



S 



Oleacina^ 



8 



32 



19 



5 



13 



22 



5 



5 



1 



TornatelUna, 







1 



5 





1 





3 



2 



Pupa, 



19 



3 



3 



12 



27 



9 



3 



6 



3 



Macroceramus, 



2 



1 



3 





28 



1 



11 



1 





Cylindrella, 



4 



25 



7 



3 



83 



40 



26 



4 



4 



Balea, 









2 



1 











ClausiUa, 









8 









1 





Vitrina, 



8 













1 







Simpulopsis^ 





5 





9 







1 



1 



1 



iSuccinea^ 



22 



8 



3 



12 



11 



4 



2 



4 



10 



In order to elucidate the facts as to the distribution of the 

 inoperculated land shells on the American Continent and in 

 the West Indies, more completely than can be done by the 

 use of Pfeifter's classification, I prepared the subjoined Cata- 

 logue from the last edition of the "Die Heliceen" of Albers. 



The Catalogue gives, with the name of a typical species of 

 each, the names of all the genera and subgenera, from the 

 work referred to, which are known to be represented either 

 on the Continent or Islands, distinguishing as distinct faunas 

 those of Eastern Korth America, the West Coast of North 

 America, Mexico, Central America, South America, and of 

 the five subprovinces into which, in my former papers, I di- 

 vided the West Indian Islands. A single asterisk (*) indicates 

 the occurrence of species (of the genus or subgenus mentioned 

 in the first column) in the province named at the head of the 

 column, — two asterisks (**) that in such province the genus or 

 subgenus has its greatest specific development. 



I do not, by any means, accept or adopt, as a whole, the 

 classification of Albers, but I use it as the most convenient 

 for my present purpose, considering that it enables me to pre- 

 sent a very interesting and approximately correct view of the 

 relations of the faunas in question. 



