DISTRIBUTION OF GENERA AND SPECIES. 
171 
NUMEEK OF SPECIES. 
GENERA. 
Cuba. 
By De la Sa£ra. 
Cuba. 
By Pleifler. 
South America. 
By D'Orbigny. 
United States. 
Tebennophorus 
Vaginulus . . 
Ariou . . . 
Limax . . . 
Vitrina . . . 
Succinea . . 
Bulimus . . 
Helix . . . 
Glandina . . 
Pupa . . . 
Vertigo . . . 
Cylindrella . . 
Helicina . . 
Cyclostoma 

1 



1 
12 
22 
2 
9 










11 
16 
4 
4 

4 
8 
4 
. 
2 . 
. 
2 . 
. 
4 . 
91 . 
26 . 
. 
4 . 
. 

4 . 
2 . 
2 
1 
1 
3 
1 
9 
11 
79 
2 
8 
5 
3 
3 
1 
Total 
47 . 
. 51 . 
. 135 . 
. 129 
We notice, in the first place, the South American list. 
Here Vitrina, Vertigo, and Glandina, all the genera of 
the Limacidce except Vaginulus, which replaces Teben- 
nophorus, being, like that species, entirely covered with 
a mantle, are wanting. Succinea holds a smaller nu- 
merical proportion than in North America. Bulimus 
predominates in the astonishing proportion of ninety- 
one in a total of one hundred and thirty-five ; holding 
about the same rank there, that Helix maintains in the 
southern part of Europe. Helix is reduced to a sixth 
part of the whole number. Pupa remains very subor- 
dinate, and Helicina and Cyclostoma are merely repre- 
sented. In the Cuban list of M. De la Sagra, Tebenno- 
pJiorus, Vitrina, and Vertigo are wanting ; and a single 
Vaginulus represents the whole family of Limacidce. 
