MONOGRAPH OF THE GENUS STROPHIA. 
14>J 
HABITS AND DISTRIBUTION. 
The Gigantic Strophia occurs in the thickets which grow' along 
the hillside to the southward of the ruin of which I have spoken as 
Wing on the eastern hill, midway of the key. They are very solitary 
in habit, each usually living apart from its fellows. 
The dark form I found in a little valley on the hillside near the 
landing-place, which is near the head of the southern bay, under the 
thick shade of some dense foliage. 
39 STROPHIA GRAY! PUMIUA Norn 
Short Strophia 
Fig. 44. B, front view' of type. 
DESCRIPTION. 
Sp. Ch. Size, rather small. Shell, heavy. Striations, present. 
Whirls, nine. Examined, fifty specimens. 
Form of shell, a short cylinder, with the first three whirls 
about equal in diameter, the fourth is somewhat smaller, then the 
•shell slopes quickly to an abrupt point, forming an angle of seventy- 
five degrees. The striations are few r , eighteen to the first whirl, not 
prominent, rather regular, but not arranged in lines ; they are nearly 
straight, especially on the two upper wdiirls, hut on the remainder of 
the shell are slightly inclined from right to left ; they are narrow', 
being only about half as wide as the interspaces between them, are 
rounded, and although not furrowed, are not particularly smooth. 
Aperture, rather small, inclined to be rounded and open. Lower 
'tooth rather prominent, about .03 high-, and about twice as long as 
high, is a little elevated is set back about once its length from the 
irontal bar, and is about central in position. Upper tooth present, 
but very small and elevated above the top of the lower. 
Margin, not produced forward quite as far as the diameter of the 
shell, and although placed a little to the right of the center of the shell 
is not inclined to the right. The edge is rounded, and considerabl 
thicker than the shell behind it, but is nut rolled backward. The 
frontal bar is developed w'ell enough to completely interrupt the 
striations, but projects very slightly beyond them. 
Color, dull white throughout, externally : internally, pale brown 
becoming white on the teeth and margin. 
