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35
Fairly Difficult

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Chapter 1

Porto Praya. Ribeira Grande. Atmospheric Dust with Infusoria. Habits of a Sea-slug and Cuttle-fish. St. Paul's Rocks, non-volcanic. Singular Incrustations. Insects the first Colonists of Islands. Fernando Noronha. Bahia. Burnished Rocks. Habits of a Diodon. Pelagic Confervae and Infusoria. Causes of discoloured Sea.
ST. JAGO--CAPE DE VERD ISLANDS.