MONOGRAPH OF THE GENUS STROPHIA. 
21 
south western portion. The “Cote de Fer, ” or iron shore, is quite a 
common name in the West Indies, and is applied to any rough, rock- 
bound line of coast. 
66 STROPHIA OBSCURA. Novo. 
Obscure Strophla. 
Plate III, fig. 5 front, fig. 6, side view of t} T pe. 
DESCRIPTION. 
Sp. Ch. Size medium. Shell rather thick and heavy Striations, 
absent. Whirls 9, the upper of which is about equal to all of the others 
put together. Examined 50 specimens. 
Form of shell, a pointed cylinder, with the first two whirls equal in 
diameter, from this the shell slopes to a rather acute point, forming an 
angle of about 50 degrees. The shell is quite smooth, marked with 
faint and irregular lines of growth, which scarcely assume any prom- 
inence even on the upper whirl. The whirls are not bulging and the 
suture is shallow. 
Aperture of medium size, quite open and slightly contracted with- 
in. The lower tooth is small, about .04 high, about twice as long as 
high; is single, is set back at least twice its length from the frontal bar, 
and is situated a little to the right of the centre. The upper tooth is 
about as high as the lower, but extends back around the column, is set 
well back, begining about in the middle of the lower, but is not set 
high up on the column 
The margin is not produced forward beyond the diameter of the 
shell, is slightly inclined back at the top, and a very little to the right, 
scarcely beyond the diameter of the shell. It is a little thickened, 
about .05 ) is rolled over and reflexed outward a very little, ( about .03 ) 
and the edge is smoothly rounded. The frontal bar is quite well devel- 
oped, but is not much inclined. 
Color of shell externally, bluish white, obscurely marked with zig- 
zag, longitudinal lines of very pale yellowish brown. These markings 
are scarcely to be seen with the unaided eye on the upper portion of the 
shell, but are a little better developed on the spiral whirls, where they 
are rather more regular and numerous. Internally, flesh color becoming 
white on the margin. 
DIMENSIONS. 
Size of type 1.10 by .42. Largest specimen, 1.15 by .50; smallest 
.98 by .40. Longest specimen 1.15, shortest, .98. Greatest diameter 
.45, smallest, .40. 
