106 
F. Sacco 
Numero d’ordino 
FORME 
Villafrancliiano 
Astiano 
Piacenziano 
Messiniano 
Tortoniano 
o 
o 
> 
o 
c 
'S: 
s 
Aquitaniano 
Stampiano 
Tongriano 
© 
3 
X 
© 
o 
© 
o 
d 
C 
o 
5 
T 
ti 
2636 
2637 
2638 
2639 
2640 
2641 
2642 
2643 
2644 
2645 
2646 
2647 
2648 
2649 
2650 
2651 
2652 
2653 
2654 
2655 
2656 
2657 
2658 
Nassa Pareti May. 
-4- 
| 
» 'pryRYnnf.lii.m, "Rvnfìfìh. . . . 
-t- 
l 1 
n ’RrucjnnnÌR Tifili- . . 
—H 
-4— 
-f- 
l 1 
ii Jinre.Jlinnn "Rfill 
1 1 
» » var. acutispira Sacc. (A. 
Bell.) . 
n n var. brevispira Sacc. (B. 
Bell.) . 
» » var. convexiuscula Sacc. 
(C. Bell.). 
» clathrata Born. 
-t— 
-4— 
1 1 
» n var. obtusopercostataSa.ee. 
(A. Bell.). 
» emiliana May . 
J 
--4- 
1 1 
» » var. percostulata Sacc. (A. 
Bell.). 
» Contraimi Bell. 
-+- 
I i 
1 1 
» scalaris Bors. 
1 
1 ! 
| 
» Cocconii Bell. 
J 
| 
>: » var. sub clathrata Sacc. (A. 
Bell.). 
-4— 
—f— 
-4— 
-4- 
» » var. peracuta Sacc. (B. 
Bell.). 
)> proavia Bell. 
» » var. pluricostata Sacc. (A. 
Bell.). 
» » var. obliquecostata Sacc. 
(B. Bell.). 
» semiruqosa Bell. 
» Brusinae Bell. 
» semicostulata Bell. 
» perrara Bell. 
