138 
MONOGRAPH OF THE GENUS STROPHIA. 
One of the most striking features of this species appears to he its 
powers of endurance. I hare now a number of living specimens that 
were collected on Highburn Key on April 8th, 1893, that have been 
kept in a box in my cabinet. Last summer they gave me some trouble 
by wandering about over the other boxes, but have not attempted to 
move much since, but today, December 15th, I pierced the shell of one 
and found the animal, which is a pale horn color, lively, and it imme- 
diately shrunk back a whirl in from the broken portion of the shell, 
but did not form the usual partition. Although I put both this specimen 
and that of Cory’s Strophia, of which 1 have spoken, in water, yet the 
animals have not as vet ventured out of their shells. 
•/ 
37 STROPHIA GRAYI Novo. 
Gray’s Strophia. 
Fig. 42, A, front, B, side view, of type. 
DESCRIPTION. 
Sp. Ch. Size, rather large. Shell, thick and heavy. Striations, 
present. Whirls, eleven. Examined 700 specimens. 
Form of shell, cylindrical, the first three whirls leing about equal 
in diameter, the fourth is a little 
smaller; then the shell slopes to a Flg. 42. 
blunt point, forming an angle of sixty- 
nine degrees. 
The striations are not numerous, 
sixteen to the first whirl, are rather 
prominent, not very regular, and not 
arranged in lines ; they are not fur- 
rowed, are smoothly rounded, and 
slightly polished : the interspaces 
between them are wider than they 
are, and furrowed with longitudinal 
lines of growth. 
Aperture small, with the corners 
. , Strophia grayi. A, fr-mt view, 13, skit' 
decidedly angular, especially below, view of type, 
slightly contracted at the entrance. 
Lower tooth quite prominent, .04 high, as wide as high, and twice as 
long as high; it is set very far back, .12 from the frontal bar. is not 
at all elevated, and is about central in position. Upper tooth absent. 
