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- Amblyrynchus Demarlii: a species of lizard found on some of the islands of the Galapagos Archipelago.
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- A mineral with inclusions resembling small plants.
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- Two tiny sea-creatures with bodies like tubes with conical ends, joined together.
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- A drawing of the head and bill of the Scissor-beak bird, from the side, showing the much longer lower mandible, and from above showing its laterally flattened beak.
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- A globular fungus with its entire surface deeply pitted or honeycombed.
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- Sketch map of the glacier which reaches the Gulf of Penas, showing the length and width of the glacier, and a morass to the west of it.
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- Sketch map of the islands of the Galapagos Archipelago, consisting of ten principal islands, of which five are much larger than the others.
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- 1. Geospiza magnirostris. 2. Geospiza fortis. 3. Geospiza parvula. 4. Certhidea olivasea.
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- Amblyrhynchus cristatus. a: Tooth of, natural size, and likewise magnified.
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- A drawing of a coral atoll in the Pacific Ocean showing its circular formation.
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- Drawing of the interior of a coral atoll, with an island and distinct peak in the center.
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- 1. Vanikoro. 2. Gambier Islands. 3. Maurua. The horizontal shading shows the barrier-reefs and lagoon-channels. The inclined shading above the level of the sea (A) shows the actual form of the land; the inclined shading below this line, shows its probable prolongation under water.
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- AA. Outer edges of the fringing-reef, at the level of the sea. BB. The shores of the fringed island. A′A′. Outer edges of the reef, after its upward growth during a period of subsidence, now converted into a barrier, with islets on it. B′B′. The shores of the now encircled island. CC. Lagoon-channel. N.B. In this and the following woodcut, the subsidence of the land could be represented only by an apparent rise in the level of the sea.
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- A′A′. Outer edges of the barrier-reef at the level of the sea, with islets on it. B′B′. The shores of the included island. CC. The lagoon-channel. A″A″. Outer edges of the reef, now converted into an atoll. C′. The lagoon of the new atoll. N.B.—According to the true scale, the depths of the lagoon-channel and lagoon are much exaggerated.
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- The interior structure of a volcanic bomb, showing the coarsely cellular central part, the cells decreasing in size towards the top of the drawing, followed by a shell-like case and outer crust.
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