34 
MONOGRAPH OF THE GENUS STROPHIA. 
have just described, thus confirming my theory that there must be more 
species found of this remarkable sub-genus, for, although these speci- 
mens were simply labeled “ Cuba, v I have no doubt but what they came 
from the neighborhood of Gibara, Cuba. 
S. faxoni differs from S. scalarina not only in being at least three 
times as large, but also in other important particulars. The form of 
the shell is rather different, the first two whirls being about equal in 
diameter, the margin is more flanging, and on the right side has the pe- 
culiar minute tubercles, arranged in lines. The striations are also quite 
different, being irregular, narrower and crooked, and not enlarged in the 
middle. I have named this species for Dr. Walter Faxon, who has dis- 
played the utmost interest in my work upon Strophia and also has 
kindly aided me in many ways. 
73 STROPHIA CYLINDRICA. Novo. 
Cylindrical Strophia. 
Plate VII, fig. 3, side, fig. 4, front view of type. 
DESCRIPTION . 
Sp. Ch. Size medium, shell thick and heavy. Striations, present . 
Whirls, 10, the upper of which, including margin, about equal in width 
to the next four all together. 
Form of shell, an obtusely pointed cylinder, with the first three 
whirls equal in diameter, the fourth is but little smaller and from 
this the shell slopes abruptly to an obtuse point, forming an angle of 
sixty degrees. The striations are numerous, twenty-four to the first 
whirl, they are not very prominent, straight, but slightly bent to the left 
on the suture, and they extend along it, tapering into a point ; they are 
polished above, not furrowed, arranged in lines, and are of varying 
width, but are never wider than the interspaces between them. The 
suture is very shallow and very narrow. 
Aperture, quite small, not open, nor contracted within. The lower 
tooth is not more than .03 high, and is about four times as long as high , 
is set back about .12 from the frontal bar. Behind this central tooth 
on either side the chancelled tooth begins and extends around the first 
whirl. The upper tooth is about as high as the lower and extends back 
around the column. 
The margin extends forward as far as the diameter of the shell, 
is a little inclined backward and very slightly to the right, but scarcely 
beyond the diameter of the shell. It is not thickened, is rolled over, 
but not flanging and the edge is rounded. The frontal bar is quite well 
