Synopsis
A Manual Of The Sub-Kingdom Protozoa: With A General Introduction On The Principles Of Zoology by Joseph Reay Greene. This nineteenth-century manual provides a concise survey of Protozoa, outlining the twofold nature of living beings (morphology and physiology), and proposing a natural, rather than artificial, classification of the animal kingdom. The work surveys the sub-kingdom Protozoa, detailing groups such as Rhizopoda, Polycystina, Spongida, Thalassicollida, Gregarinida, and Infusoria, with chapters explaining the structure, reproduction, development, and distribution of representative forms such as Amoeba, Foraminifera, Spongilla, Vorticella, and Noctiluca. The General Introduction on the Principles of Zoology lays out foundational concepts: morphology, physiology, development, correlation of form, and the distinction between homologous and analogous organs. While written in the 1860s, the text remains a classic reference for early protozoology, illustrating how simple organisms reveal broad patterns in evolution, classification, and the unity of life.
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