Contains fine plates which include all American genera.

The analytical habit of mind which finds vent in the subdivision of species, is also exhibited in a tendency to break up large genera into a number of small ones, but in the present group this practice has the disadvantage of obscuring a broad distinction between the dominant types inhabiting respectively the old world and the new.

The VERTEBRATA.Among fishes I have referred to the Coelacanthini (comprising the genera Coelacanthus, Holophagus, Undina, and Macropoma) as affording an example of a persistent type; and it is most remarkable to note the smallness of the differences between any of these fishes (affecting at most the proportions of the body and fins, and the character and sculpture of the scales), notwithstanding their enormous range in time.

We all come to be marked upon by nature and dismissedhow carelessly!as genera or species.

And as I have thus divided the genera of causes, without which nothing can be effected, so also the genera of the efficient causes can be divided in the same manner.

The exquisite engravings, illustrating the genera of Ferns, Hepaticæ, and Mosses, are also a great assistance.

From the Phaedrus you may learn all the intelligible and intellectual genera, and the liberated orders of the gods, which are proximately established above the celestial circulations.

He prepared the genera Equisetum and Isoetes for the seventh edition of "Gray's Manual."

"Hence, as it appears to me, Timaeus with great propriety thinks it fit that we should produce the divine genera, following the inventors of fables as sons of the gods, and subscribe to their always generating secondary natures from such as are first, though they should speak without demonstration.

And in this case, as also in our own character, it will be in our power to run over all kinds of argumentation separately: and at one time to refer all separate genera to different classes of the division, and at another to ask of the hearer what he requires, and at another to adopt a similar course by a comparison of one's own arguments and those of the opposite party.

As there are objections to considering these characters as of family value, arising from the intermediate position of the circumpolar genera Alces and Rangifer, as well as the water deer and the roe, a broader meaning is given to classification by retaining the comprehensive genera Cervus and Mazama, and recognizing the subordinate divisions only as sub-genera.

The sea urchins of the deep sea, while none of them are specifically identical with any chalk form, belong to the same general groups, and some closely approach extinct cretaceous genera.

The domestic dog is undoubtedly descended from at least a dozen different species of wild dogs, wolves, and jackals, some of them probably belonging to what we style different genera.