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Geological Specimens in Box No.1. Sent from Rio de Janeiro, Dec't 1825.
(Digito) James D. Dana
From Porto Santo
Nos. 1, 16, 17. Limestone from P.D. ottainis on the Islands of Madeira,
where it is brought to burn for lime.
2-26.- The same Limestone, containing fossils. Nos. 12, 24, contain
pebbles of the Volcanic rock of P.D. indicating the recent ori-
gin of the Limestone.
From Madeira
Nos. 28-35.- Form a recent limestone formation on the eastern ex-
tremity of Madeira, near Canical.
Nos. 32-35.- Contain several specimens of recent land Opea hali-
kolaj mitinikis Cala & A. Trunciculata of Doubtied, also a small Con-
thium, Trochus & Littorina.
Nos. 36-41.- From the same formation
" 42-45.- Porous basalt, encrusted with bands of lime-
from the cliffs between the mouth of the River Biscoe's & Planes
de Labas.
Nos. 46-47.- Red Tufa, containing bands of lime; from same locality,
where it forms a layer of 2 to 3 ft. between the solid basalt. This
layer contains also concretions of hard lime.
Nos. 48-50.- Red Tufa, from this valley of the River Biscoe's.
Nos. 51-52.- Pieces of Numicis; from a layer of Porous tufa, 3 ft.
high, at the Dragon Head.
Nos. 53-55.- Composite Specimens of Tufa, from a layer 6 to 7 ft.
high: The upper part hard and prismatic; the lower soft and
yellow.- Dragon Head.
Nos. 56, 57, 59.- Yellow Tufa.- Dragon Head.
Nos. 60-63.- Porous basalt, of a brownish color, from the
upper boundary of the lower basaltic layer at the Dragon Head.
Nos. 64, 65, 67.- Similar Seria, encrusted with globular concretion
of hard lime. (Aragonite.)
No. 69.- More Porous than the preceding; similarly encrusted.
" 70.- Brick red Seria.- from the central.
" 74, 75, 76.- Compact Basalt, from the Dragon Head.
" 76 & 78.- Yellow Tufa, containing grayish green crystals of
Chrysotile.
No. 87.- The same Tufa, in contact with the superincumbent rock.