NOTES ON THE ANIMALS OF SOME WEST COAST 



SHELLS. 



BY HENRY HEMPHILL. 



Trivia solandri Gray. A single living specimen of this beau- 

 tiful little moUusk 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 aiii- 

 'mal. , , 



^ -'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 yg 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- 



