196 WEST AMERICAN SHELES 
ures 204 and 205, occurs at 
Cayucos, San Luis Obispo 
Co., Cal. The color of the 
shell is light gray, with a 
narrow median brown band. 
The figures are much en- 
larged, as the shell is only 
16mm. in length, and are re- 
Fig. 205 x 4 (#) 
Fig. 204 x 4 (4) 
produced by permission 
from the original engray- 
ings. The shell is named in 
honor of the Mr. G. W. 
Michael, who collected the 
first specimens. 
Ocinébra poulsoni, Nutt., 
Poulson’s Ocinebra, has a 
strong, spindle-shaped shell, from one to two in- 
ches in length. 
Its surface is strongly marked 
with rounded varices, which are crossed by spiral 
ridges and fine, dark, spiral lines. The walls of 
the aperture in mature specimens are pure white, 
and within the outer lips are five or six little round 
knobs, or teeth. 
The canal is open and somewhat 
curved, and the operculum is a thin, brown scale. 
(+) By permission from author of species. 
