TOPS AND TURBANS. 945 
the epidermis coffee-brown, and the nacre green- 
ish. Its greatest height is 19mm. Its home is on 
the California coast. 
Margarita pupilla, Gld., the Little Mar- 
garita, Figure 275, is a northerner, living 
in Puget Sound, but sometimes coming 
further south. It is yellowish brown or 
ashen in color and its four whorls are marked with 
spiral ridges. The umbilicus is distinct, but small, 
and the aperture is nearly circular. Its height is 
sometimes as great as 13 millimeters. 
Margarita helicina, Fabr., the Helix Margarita, 
is decidedly aretic in its tastes, living on the shores 
of northern EKurope, eastern America, and around 
Bering Strait. The shell is umbiliecate, thin, flesh 
colored, polished and shining. Its height is 6mm., 
and its diameter is a little more. 
Margarita lirulata, Cpr., the Lirulate Margarita. 
This very variable species has a globose-conical 
shell, solid, purplish, or more or less variegated. 
The surface sometimes has spiral ridges, or lyre, 
though sometimes it is nearly smooth. The suture 
is impressed, the body-whorl convex beneath, the 
aperture oblique and very iridescent within. The 
diameter is 4 or 5mm. ‘This species includes 
Gibbula succinecta, G. pareipicta, and several for- 
mer species. 
