MONOGRAPH OF THE GENUS STROPIIIA. 
149 
shell, is rather central in position in the shell, and is slightly inclined 
to the right, but not beyond the diameter of the shell. It is thickened ^ 
about .05, and is beveled. The frontal bar is well developed, and is 
considerably thickened, completely interrupting the striations. 
Color of shell, as far as can be made out from dead specimens, 
was white, externally, brownish within. 
DIMENSIONS. 
Size of type, 1.33 by .50. Largest specimen, 1.45 by .52; 
smallest, 1.27 by .45. Greatest diameter, .55 ; smallest, .45. Longest 
specimen, 1.45; shortest, 1.27. 
OBSERVATIONS. 
Individual variation is toward a form that is more elongated, but 
still with eleven whirls, otherwise there is but little variation from the 
type. The large double central tooth of this species shows the 
relationship of this shell with S. eburnia, and, as it inhabits a key 
only about a mile distant, is beyond doubt the ancestor of that species. 
HABITS AND DISTRIBUTION. 
Fig. 40. 
The Long Strophia occurred on a little key that lies about a mile 
north of U Key, at Allen’s Harbor. 1 say occurred, for as far as we 
could ascertain by the most car jful search, 
no living specimen is now to be found on 
the key, nor were were there any shells 
seen that appeared to have been very 
recently alive, but some show great a<re. 
In an article, earlier in this volume, I 
have spoken of this key as having been 
the resoi-t of the Lucavan Indians, and the 
conch shells of which 1 have spoken as 
having been opened by them, do not appear 
to be older than many of the specimens of 
Strophia elongata which lie scattered near 
them, hence we may conclude that this 
Strophia was living on the key when it 
was inhabited bv the Indians Possibly 
then the key was partly cleared of shrub- 
bery, and after the departure of the Indians 
the thick growth, which now covers 
B 
•trophia eloiigatn. 
side view. 
A 
A, front 
it. sprurg 
up 
causing changes, 
c O * 
