MONOGRAPH OF THE GENUS STROPHIA. 
71 
DIMENSIONS. 
Size of types, 1.03 by .36 and 1.03 by .33. Largest specimen, 1 .07 
by .40; smallest, .85 by .33. Greatest diameter, .41; smallest, .32. 
Longest specimen, 1.07; shortest, .85. 
OBSERVATIONS. 
There is a slight inclination to assume a cylindrical form but the 
pointed specimens are the most common. 
Known by the coarse striations, thin shell, pointed form, and pale 
ground colors, with the white striations and margin. 
DISTRIBUTION AND HABITS. 
The Pallid Strophias occur on the island of Inagua in the cultiva- 
ted fields that lie on the slopes of the hills that border the southern 
shores, between fifteen and twenty miles from Mathewstown, and pos- 
sibly elsewhere on the island. 
85. STROPHIA PERPLEXA Novo. 
Ridged Strophia. 
Plate VII, 1 5 & 15a, shell, and Fig. 7, a left side, b front. 
DESCRIPTION. 
Sp. Cit. Size, medium. Shell, thick and rather heavy. Stria- 
tions, assume the form of irregular ridges. Whirls, 11. Examined 
300 specimens. 
Form of shell, inclined to cylindrical, the first 
two whirls being equal in diameter and the third is 
but little smaller. From the third whirl, the shell 
slopes rapidly to a rather blunt point, making an 
angle of about 60 degrees. The striations are rep- 
resented by irregular, slightly elevated ridges, that 
are rather more prominent on the upper portion of 
the shell. Some of the ridges are a little flattened 
B a on the top and furrowed. 
Fig. 7 Aperture, rather small and narrows within. 
Lower tooth, prominent, .05 high, .24 long, and its position is just a lit- 
tle to the right of the centre; the upper is not as prominent but meas- 
ures .05 and makes a complete turn around the column. 
Margin, not produced forward beyond the diameter of the shell, is 
not inclined to either side, is considerably thickened, measuring .06, 
