NOTES © ON THE ANIMALS OF SOME WEST COAST 
SHELLS. 
BY HENRY HEMPHILL. 
Ti€ 
. Trivia solandri Gray. A single living specimen of this beau- 
tiful little mollusk recently collected by Miss Ida M. Shepard, at 
Ballast Point, San Diego Bay, and which she kindly brought to me 
for examination, enabled me to make the following note on the ani- 
mal.” 4 
-When the animal is fully extended, the mantle lobes completely 
envelop the shell. The lobes are of a brownish flesh-color, thickly 
though not closely crowded with mammillated. tubercles, about. 
thirty-five on each side, flecked and frosted with whitish specks. 
The tubercles vary some in size and form, the larger ones being 
rounded and broad at the base, while the smaller ones are narrower 
and more conical. The nipple-like processes that rise from their 
‘summits vary in number from one to four on each tubercle, their 
tips being also frosted with whitish specks. The spaces between 
the tubercles are a shade darker than other portions of the mantle, 
and peppered over with irregular black specks. The edges of the 
mantle lobes that meet on the summit of the shell are lighter in color 
than other portions of the mantle, and are also covered with black 
specks like those between the tubercles. 
When the animal is in motion the proboscis extends forward like 
the bowsprit of a boat; it is about % an inch long, a shade or two 
lighter than the mantles, flecked with whitish specks like those 
on the tubercles, with its end slightly expanded and edged with 
white. Two slender tentacles about ;, of an inch long when fully 
extended protrude from the head near the base of the proboscis, each 
one bearing a black piercing eye, about midway between their tips 
and the head of the animal. 
The foot is about as broad as the shell, truncated in front and 
roundly pointed behind, when the animal is in motion. The front 
of the foot is marked beneath by a very fine transverse dark line, 
which perhaps serves to define the front edge of the sole. The sole 
is lighter colored than other portions of the animal that are exposed 
outside of the shell, and is beautifully and profusely flecked with 
very small whitish dots. 
The animal was slow in its movements, its motion being a contin- 
