56 WEST AMERICAN SHELLS 
In Figure 41 a nearly 
life-sized view is given of 
both the inside and the 
outside of Phacoides equi- 
zonatus, Stearns, the Band- 
ed Lentil-shell, a rare spe- 
cies, specimens of which 
were dredged from deep 
water in the Santa Bar- 
bara Channel. Most of the 
shells of the genus Phacoi- 
des, which means ‘‘lentil- 
like,’ were formerly 
called Lucina, a name ap- 
plied to one or more of the 
Figs 41") heathen goddesses of the 
olden time. 
Figure 42 represents one of the 
most common bivalve shells to be 
found along the coast of central 
California. Its present name is 
Phacoides californicus, Conr., the 
California Phacoides, (Lucina 
Californica). It is pure white, 
circular in outline, and varies in 
size from the diameter of a dime to that of a half- 
dollar. The cardinal hinge-teeth are small, while 
the lateral ones are strong. The ligament is exter- 
nal, and the lunule, in this species, belongs wholly 
to the right valve, instead of being divided nearly 
equally between the two. As in other species of 
this genus the forward muscle-scar is long and 
narrow, and the pallial line is entire. 
