/ 
C&Xices 2,5 to 3.5 am. in diameter; from lees than 1 am. to 2 mas* 
apart. The upper margin ia usually not elevated* while the lower on© 
is, thus tilting the e&Xicul&r orifices* = The MfSltttttt length of the 
lower limit of the c&Xic® is about 3 am. Subequal, relatively thick, 
i 
dentate costa® correspond to all. septa. 
i The usual number of septa is three complete cycles, primaries and 
secondaries sub r qua! and reaching the columellas iertiarle* short, in- 
ner edges free. The septa present only one noteworthy difference from 
what is usual in 0. annularis , that is, the margins of the primaries 
and secondaries are less ex sort. 
Columella not very large* loose, trabecular. 
The thro® salient character! sties of this variation are, (l) ,ite 
growth form; {2}, the diet ally tilted calicos; (3) , the lower margin® 
of the primary and secondary septa* 
geologic her i® on i Pleistocene. 
