160 
GEOLOGY. 
the driftings of modern rivers, but also extensive deposits of drifted materials of various 
ages and at various elevations, and beds of marine shells, some of which occur more 
than a thousand feet above the sea. These shells have been examined by Mr. Broderip, 
and nearly all of them appear to be identical with those of testacea that now live on the 
adjacent coast. They seem to owe their position to some natural operation which has 
elevated the land. The probability of their having been raised to their present place 
by the effect of earthquakes, has been alluded to by Mr. Lyell in his principles of 
Geology, 3rd Edition, vol. iii, p. 395, and vol. ii. p. 244. Deposits of recent shells 
have been found on the summit of some parts of the coast, which are derived from tes- 
taceans taken up by the natives for food.* 
The following list has been prepared by Mr. Broderip : 
CRUSTACEA. 
Fragments of the pincer of a crab. 
CIRRIPEDI A. 
Balanus psittacus, (Lepas psittacus, Molina) ; recent at Concepcion de Chile, 
and on the neighbouring coasts, where it is called Pico by the inhabitants, who collect 
numbers of these cirripeds, together with the concliifera and mollusca of the adjoining 
sea for food. 
CONCHIFERA. 
Amphidesma. N. S. (one valve only). 
Solenocurtus solidus ? Gray. Solecurtus, Blainville. 
If not this genus, new, appi’oaching amphidesma (one valve only, and the hinge is 
much injured). 
Pecten purpuratus, Lam. ; recent; common at Valparaiso, Coquimbo, &c. 
MOLLUSCA. 
Fissurella ; two species. Both recent at Valparaiso, Coquimbo, &c. 
Calyptraea extinctorium, Lam. ; recent at Valparaiso, &c. 
Crepidula Byronensis ? Gray. Perhaps a variety of C. Peruviana, Lam. ; recent 
at Valparaiso, Coquimbo, &c. &c. 
Helix? The mouth is much injured but enough remains to show that it was not, 
sufficiently round for a Cyclostoma. 
Monodon (Monodonta, Lam.); very imperfect; recent, common at Valparaiso, 
Coquimbo, &c. 
* The Editor was informed by Captain Phillips King (Sept. 1831) that the natives of the country near Con- 
cepcion live almost entirely upon shell fish, of which there is an inexhaustible supply ; they carry them to great 
distances, 50 or 60 miles, into the interior. They have been in the habit of doing this for ages, and along the coast 
are vast piles of shells thus accumulated by the agency of man. English vessels lay in stores of these testaceans and 
take them an eight or ten days’ voyage from Concepcion, as far as Valparaiso. 
