MONOGRAPH OF THE GENUS STROPHIA. 
109 
more heavily marked than in the type and others less heavily. There 
are. however, three prominent departures from the type, which if 
placed under different environment at any time, will form distinct 
species, but which intergrade so completely with the type form that 
I have not considered it necessary to name them, but have designated 
them by numbers. The type form occurs in the large cemetery to the 
eastward of Nassau, on the western side of a path which crosses the 
grounds. 
No. 1. Form of shell about that of the type, but this is a rather 
small form, .90 by .40, with a thicker margin, (.10), projecting more 
forward, smaller aperture, more striations, 31 on the first whirl, with 
the interspaces about as wide as the prominences. The fleckings are 
slight and much paler within than in the type, with no distinct 
blotchings, This form is inclined to occur to the westward of the 
type location. 
No. 2. An elongated cylindrical form, with eleven whirls, the 
first three of which are about equal in diameter, and with the 
remainder forming a rather acute point, having an angle of 50 
degrees. The striations are fewer than in the type, 21 to the first 
whirl, less prominent, but with lines of growth between. The margin 
is thick (.07) with aperture widening from within. The fleckings are 
inclined to mass into blotches, but their color is pale. This form 
occurs to the southward of the type location. 
No. 3. Of about the same form as the type, but is a larger 
shell, 1.10 by .45, with a very thin margin, about .03, and apertures 
widening from within, striations 27 to the first whirl, very regular, but 
not in lines. Occurs to the extreme southward and eastward of the 
type location. 
No. 4. Is a more pointed form than the type, narrowing from the 
first whirl. About the size of the type, with margin and aperture 
similar, but the striations, excepting on beginning of upper whirl, 
near margin, are reduced to irregular lines of growth, which are promi- 
nent only in places, leaving the shell quite smooth and polished in 
spots. The fleckings are massed in blotches and are very dark in 
color, contrasting with the creamy surface. This form is very rare. 
I found five only among some banyan trees that stand on the top of a 
little hill in the cemetery, near an old ruin. 
No. 5. Rather singularly there is a form of S. curtissii on 
Spotter’s Key, a little islet lying in the middle of Nassau harbor, 
distant from the cemetery about a third of a mile. This islet was 
