THE CALIFORNIAN TRIVIA. 
body a vivid orange-scarlet; the body proportionally very much 
shorter posteriorly and narrower than in Trivia Europea Mont. 
(Fig. 147, natural size), as figured in Adams’ Genera, Vol. iii, 
_ pi. 28, fig. 5; towards and at the end of the proboscis, the color 
_ tones into a reddish-brown ; the eyes are upon slight protuberances 
upon the outer base of the tentacles; the color of the mantle 
= (which is quite thin and almost transparent) when extended over 
_ the back of the shell is neutralized by the purple color of the 
latter, and the edge of the mantle appears to be slightly waved, 
= and is alternately closely dotted with small whitish and brownish 
_ Spots; small whitish papillose spots may also be seen irregularly 
_ placed on the surface and sides of the mantle; the animal is quite 
-= active; from a fancied resemblance Fig. 146. Fig. 147. 
= to beans, our Spanish Californians 
= also found in the Gulf of California. 
_ An interesting fact pertaining to 
the distribution of this and quite 
likely other related species is worthy 
of notice. Bodega Head, where in 
June, 1867, accompanied by Dr. W. 
= Newcomb, I made’ a collection, is 
— about one hundred and forty miles : 
north oË Point Piños, and consists of Trivia Californica. Trivia Europea. 
an abrupt but not very extensive outcropping of coarse granite 
_ Similar to the rocks of Point Piios; at Bodega I detected the 
Same species of corals and the Trivia, subsequently collected at 
the Monterey station; the corals seem to affect the harder rock, 
for at the intervening points where I have made collections, I 
ve been unable to find either of the corals or a solitary Trivia, 
2 coast being composed almost exclusively of the sedimentary 
rocks. 
The common shore shell, Littorina planaxis, also appears par- 
tial to the granite, though sometimes found on the shales. ! 
_ From the above it may be inferred, other requirements being 
Present, especially the proper temperature of the water, that the 
trence of the corals is coincident with the presence of the 
granite, that of the Trivia with the corals upon which it feeds ; 
ao ee ee d 
SE ie ee ae a 7h as Ue E Ae eT E RE AET ROR e s AIA 
Siete = 
