24 
CALIFORNIA SEA-SHELLS. 
move. The shells sometimes exceed an inch in 
length, but commonly are smaller. 
OUvella bceticct , Cpr., Slender Olive, Fig. 7, 
PI. IV, has a thin, slender, brownish white shell. 
It is smaller and less abundant than the former 
species, and can easily be distinguished by its 
longer spire, attenuated form, and brownish 
color. These two species comprise all the known 
California Olive shells. 
Conus Californicus , Hds., Fig. 1, PI. V, is 
our only representative of the great Cone family, 
which has so many beautiful members in tropical 
waters. Our little species is very humble, being 
about an inch in length, of a chestnut color, 
smooth, though sometimes found covered with a 
hairy epidermis. The dead shells may often be 
found cast up on the beach. 
Fig. 2, PI. V, represents a shell often found 
somewhat broken, named' Drillia torosa by Car- 
penter, which we may translate in part as the 
Knotty Drillia. Its color is from olive to black ; 
length, from one inch to an inch and a half, 
spindle shaped, spire of live or six whorls, orna- 
mented by a spiral row of knobs. It is found 
frequently at Monterey. 
Drillia penioillata , Cpr., Fig. 8, PI. V, Pen- 
cilled Drillia, is a very beautiful species, found 
at Santa Barbara and southward. It is larger 
and more graceful than the last named, brownish, 
with delicate markings, spire of eight whorls ; 
length, one inch and a half. 
Lnponia ( or Cijpraca ) spadicea , Gray, Fig. 
4, PI. V, Nut-brown Cow r ry, is a beautiful shell, 
