HUAFO.
This island lies between the Chonos and Chiloe groups: it is about eight hundred feet high, and perhaps has a nucleus of metamorphic rocks. The strata which I examined consisted of fine-grained muddy sandstones, with fragments of lignite and concretions of calcareous sandstone. I collected the following extinct shells, of which the Turritella was in great numbers:—
1. Bulla cosmophila, G.B. Sowerby. 2. Pleurotoma subaequalis, G.B. Sowerby. 3. Fusus cleryanus, d’Orbigny, “Voyage Pal.” (also at Coquimbo). 4. Triton leucostomoides, G.B. Sowerby. 5. Turritella Chilensis, G.B. Sowerby (also Mocha). 6. Venus, probably a distinct species, but very imperfect. 7. Cytheraea (?) sulculosa (?), probably a distinct species, but very imperfect. 8. Dentalium majus, G.B. Sowerby.