The two living species are distinguishable at a glance.
Jickeli (28) that the species are distinguishable by the characters of their nematocysts.
It is distinguishable by its uniform greyishbrown primaries, which want the tawny bars that characterize B.
In North America there is a second distinct smaller species, called the coyote or prairie-wolf (Canis latrans), and perhaps the Japanese wolf (C. hodophylax) may be distinct, although, except for its smaller size and shorter legs, it is scarcely distinguishable from the common species.
In fact, while holding firmly by the former, Bonnet more or less modified the latter in his later writings, and, at length, he admits that a " germ " need not be an actual miniature of the organism, hut that it may be merely an " original preformation " capable of producing the latter.4 But, thus defined, the germ is neither more nor less than the "particula genitalis" of Aristotle, or the "primordium vegetale" or " ovum " of Harvey; and the " evolution " of such a germ would not be distinguishable from " epigenesis."