COQUIMBO.
In the same bed, Rio Claro: Pecten Dufreynoyi. Ostrea hemispherica. Terebratula aenigma. Spirifer linguiferoides.
Same bed, near Arqueros: Hippurites Chilensis. Gryphaea orientalis.
Collected by M. Domeyko from the same locality, apparently near Arqueros: Terebratula aenigma and Terebratula ignaciana, in same block of limestone: Pecten Dufreynoyi. Ostrea hemispherica. Hippurites Chilensis. Turritella Andii. Nautilus Domeykus.
GUASCO.
In a collection from the Cordillera, given me: the specimens all in the same condition: Pecten Dufreynoyi. Turritella Andii. Terebratula ignaciana. Terebratula aenigma, var. Spirifer Chilensis.
COPIAPO.
Mingled together in alternating beds in the main valley of Copiapo near Las Amolanas, and likewise higher up the valley: Pecten Dufreynoyi. Turritella Andii. Terebratula aenigma, var. as at Guasco. Astarte Darwinii. Gryphaea Darwinii. Gryphaea nov. species? Perna Americana. Avicula, nov. species.
Main valley of Copiapo, apparently same formation with that of Amolanas: Terebratula aenigma (true).
In the same bed, high up the great lateral valley of the Despoblado, in the ravine of Maricongo: Terebratula aenigma (true). Pecten Dufreynoyi. Gryphaea Darwinii?