Land-shells could be procured only in the same alpine situations with the beetles.

I have already contrasted the climate as well as the general appearance of Tierra del Fuego with that of Patagonia; and the difference is strongly exemplified in the entomology.

I do not believe they have one species in common; certainly the general character of the insects is widely different.
If we turn from the land to the sea, we shall find the latter as abundantly stocked with living creatures as the former is poorly so.

In all parts of the world a rocky and partially protected shore perhaps supports, in a given space, a greater number of individual animals than any other station.

There is one marine production which, from its importance, is worthy of a particular history.