[25] Somewhat smaller but quite similar hollows are still preserved upon the surface of the shellmound of Ellis Landing, and are doubtless sites of houses of that nature.
Constituents of the Mound.
Shells.—The shell layers of the mound are composed principally of the following species:
Oysters, Ostrea lurida.
Mussel shells, Mytilus edulis and Mytilus californianus.
Clams, Macoma edulis and Macoma nasuta.
Many other kinds of shells, including the following species, were found scattered through the mound:
Purpura crispata and canaliculata.
Cerithidea californica.
Helix, two species indet.