MARINE UNIVALVES 161 
In Figure 148 we have a 
bold picture of a rare and 
beautiful shell named Can- 
cellaria cooperi, Gabb, Coop- 
er’s Canecellaria. Fine, liv- 
ing specimens are occasion- 
ally hauled up in the nets of 
fishermen, or are gathered 
by the dredge, but good speci- 
mens are still very valuable. 
The few that have been found 
give us proof, however, that 
the depths of the sea hold 
many choice and beautiful 
treasures, and as we look 
over the blue waves we can 
nee 
he, Sates 
in imagination call up Fig. 148, x 7 (*) 
fairy forms from their homes below. 
Cancellaria crawfordiana, 
Dall, Crawford’s Cancellaria, 
Figure 149, is another fine spe- 
cies which was dredged alive in 
Drake’s Bay, by Mr. J. S. Arn- 
heim of San Francisco. The 
surface of the shell is pale 
brown, while the throat is pure 
white. Its length is 43mm. 
It is to be hoped that many 
more specimens of this fine 
shell may be brought to the 
surface by careful dredging. 
Another rare shell belonging 
meee Gs) to the same genus is shown in 
