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Updated: June 21, 2025
Thus, on the view which I hold, the natural system is genealogical in its arrangement, like a pedigree; but the degrees of modification which the different groups have undergone, have to be expressed by ranking them under different so-called genera, sub-families, families, sections, orders, and classes.
And here the visitor may well pause to think upon the zoological travels he has already made, from the mammalia, which present the highest types of animal life; through the sub-families of birds, which form Cuvier's secondary class of vertebrata, or animals with a back-bone; to the threshold of the room in which the tertiary class of back-boned animals are deposited.
On account of a trivial difference in habit they have sometimes been separated in two sub-families: the Phaethornithinae, found in shady tropical forests; and the Trochilinae, comprising humming-birds which inhabit open sunny places and to this division they mostly belong.
Thus, on the view which I hold, the natural system is genealogical in its arrangement, like a pedigree; but the degrees of modification which the different groups have undergone, have to be expressed by ranking them under different so-called genera, sub-families, families, sections, orders, and classes.
It is a truly wonderful fact the wonder of which we are apt to overlook from familiarity that all animals and all plants throughout all time and space should be related to each other in group subordinate to group, in the manner which we everywhere behold namely, varieties of the same species most closely related together, species of the same genus less closely and unequally related together, forming sections and sub-genera, species of distinct genera much less closely related, and genera related in different degrees, forming sub-families, families, orders, sub-classes, and classes.
This priestly tribe is dispersed, like that of Levi, amongst its brethren, and has spread from Efat to Ogadayn. Its principal sub-families are, Ao Umar, the elder, and Bah Dumma, the junior, branch. The Hawiyah has been noticed in a previous chapter.
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