246 WEST AMERICAN SHELLS 
Margarites vorticiferus, 
Dall, the Northern Mar- 
garites, Figure 276, has 
its home in Bering Sea 
and adjacent northern re- 
gions. The shell is decid- 
edly flattened, and is of a 
salmon-pink color, very 
pearly, and has a diameter 
of 22 millimeters. 
“We now come to the 
genus Chlorostoma, which 
literally means  Green- 
mouth, the reference being 
to the pearly tint of the Fig. 276, x 3 (*) 
aperture. Some of the species are represented 
by innumerable specimens, while others are com- 
paratively rare. 
Chlorostoma funebrale, A. 
Ad., the Black Turban-shell, 
Figure 277, is extremely com- 
mon on the central coast of 
California. Its shell is strong, 
for it lives on the rocks midway 
between high and low tides, 
where it gets a vigorous lash- 
ing by the waves. It is so abundant that I have 
seen rocks almost black with them, of all ages and 
S1ZeS. 
On my first visit to the seaside I wanted them all, 
and I gathered and cleaned them for hours. Two 
very natural results followed; first, that there 
Fig. 277 
