250 WEST 
AMERICAN SHELLS 
Solariella oxybasis, Dall, 
the Pointed Solariella, Fig- 
ure 281, has an acute spire, 
a small umbilicus, and an 
angulated aperture. Its alti- 
tude is 13.5mm., and it was 
dredged off the Santa Bar- 
bara Islands. 
Turcicula bairdu, Dall, 
Fig. 281, x i (*) Baird’s Turban-shell, Fig- 
ure 282, is one of the finest 
deep water species that has 
recently been discovered. The 
shell is large, thin, somewhat 
eroded at the apex and cov- 
ered elsewhere with a light 
yellowish-brown epidermis, 
slightly inclined to greenish. 
Many specimens_ were 
obtained by the ‘‘ Albatross”’ 
expedition off San Clemente 
Island, in water 300 or 400 
Fig. 282 (*) 
fathoms deep. Some specimens are even larger 
than the figure, which represents one of average 
size. 
are known; 
Gibbula canfiéldi, Dall, Can- 
field’s Turban-shell, Figure 283, 
is an extremely rare shell. In 
fact, only two recent specimens 
one of which was 
Fig. 283, x ¥ (*) collected at Monterey by Dr. Dall, 
and the other by Mr. Button. 
It oceurs also asa 
