118 
MONOGRAPH OF TIIE GENUS STROPIIIA. 
twenty-seven to the first whirl ; but, rather singularly, the margin is 
heavier. The size is a little larger than that of the type, .80 by .35. 
The central tooth is greatly elongated, being three times as long as 
high, bnt the upper tooth is absent. Specimens vary a little, some 
being larger than the type and some show slight fleckings, others have 
the upper tooth. I have remarked that the bushes in the cemetery 
where this shell is found had recently been cut down and left on the 
ground. Thus it was impossible for me to tell whether this unflecked 
form occurred on them, but I should judge that it might have lived 
above the ground before it was distributed. As I could not assign a 
locality for it I have given it as a form only of S. ihorndikei. 
No. 3, is a remarkable form of shell. Short, shell with eight 
whirls only, top shaped, with the upper whirl the largest, and with 
the aperture nearly oval with the lower tooth central in position (see 
fig. 34, D, front view. The size is very small, .52 by .30, and the 
fleckings are about as in typical thorndikei. I found this dwarf form 
in the very midst of the colony of S. thorndikei, but living on the 
ground, and among them were mingled some typical S. thorndikei. 
There were about one per cent, of both Nos. 2 and 3 in proportion to 
typical S. thorndikei. 
No. 4 is a slender, cylindrical form with the first three whirls 
equal in diameter and the margin thrown well over to the right, the 
upper tooth missing, and the frontal bar is oblique and inclined to the 
right ; very dark in color, with heavy fleckings, and the color within is 
also very dark brown. Although I have but a single specimen only of 
this f irm I have considered it remarkable enough to mention. Fig. 34, D 
No. 5. Of the form and size of the white form, No. 2, but pale 
brown throughout, slightly flecked on the striations with white. I 
have a single specimen only of this form, but mention it as it is 
remarkable. 
HABITS AND DISTRIBUTION. 
There is a path which crosses the cemetery from the entrance that 
is quite frequently used, and thus being kept free from herbage, 
it forms a kind of barrier which prevents a mollusk like Strophia from 
crossing readily. S. curtissii occupied the land to the west of this path, 
but midway between the gate of the cemetery and the hill of which I 
have spoken in the account of the preceding species I found the colony 
of S. thorndikei, but to the eastward of the pathway which thus isolated 
them from the Strophias on the western side. 
