CLST 214 Lecture Notes - Lecture 7: Family Resemblance, Parthenogenesis, Marcel Lehoux
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The above can be taken as either just nomenclature (we have a way to refer to this thing unambiguously) or it can trace genetic relationships (we know how and what is it related to) Of land animals some are furnished with wings, such as birds and bees, and these are so furnished with different ways one from another" others are furnished with feet. Of the animals that are furnished with feet some walk, some creepy, and some wriggle. But no creature is able only to move by flying, as the fish is able only to swim, for the animals with leathered wings can walk; the bat has feet and the seal has imperfect feet. Some creatures are gregarious, some are solitary, whether they be furnished with feet or wings or be fitted for a life in the water; and some partake of both characters, the solitary and the gregarious.