CHE SMALEEBR SEA-SHELLS 187 
glistening, and often mottled with dots and stripes. 
This little mollusk lives in great numbers at the 
roots of the eel-grass, and dead shells are washed 
up abundantly upon the shore. 
Columbella (Astyris) aurantiaca, 
Dall, the Golden Dove-shell, Figure 
189, was found many years ago at 
Monterey by Dr. Dall. It is a little 
shell, only 5mm. in length, and it va- 
/ ries in the color of its translucent 
Fig- 189.7 shell from orange to brown. It some- 
times has zigzag brown markings. It is found at 
low water. 
Columbélla (Astyris) tuberosa, Cpr. the Tu- 
bereulated Dove-shell, is another species. The 
shell has a very slender spire and the body-whorl 
is angulated. The inside of the outer lip has a 
row of tubercules. The color is brown, and the 
length is about a quarter of an inch. 
Columbélla chrysalloidea, Cpr., the Chrysalis 
Dove-shell. This is a southern species, having a 
somewhat cylindrical shell like the chrysalis of an 
insect. There are six whorls, very slightly convex, 
while the surface is marked by delicate spiral 
ridges and furrows. The spiral ornamentation is 
prominent on the lower part of the columella. 
Length, 8 millimeters. 
