Bronn, but it is futile attempting to identify the species of this genus merely by external characters, even when aided, as in this case, by an excellent drawing of the shell.
From these facts, I have not hesitated to form my sections on characters which require close examination, though I would gladly have seized on external characters, could I have found such even moderately constant.
But the wild boars inhabiting these several countries differ so much from each other in external characters, that they have been ranked by some naturalists as specifically distinct.
I refer only to external characters, on which, however, it must be confessed that most genera of birds have been founded.
I do not hesitate to affirm that some domestic races of the rock-pigeon differ fully as much from each other in external characters as do the most distinct natural genera.
We can, I think, further understand the frequently abnormal character of our domestic races, and likewise their differences being so great in external characters, and relatively so slight in internal parts or organs.
In other words, external characters give no certain index to the degree of vegetative affinity or of sexual affinity between two kinds of plants.
As far as external characters go, some of the species of Paecilasma have not stronger claims, than has L.
The above list will hopefully provide you with a few useful examples demonstrating the appropriate usage of "external characters" in a variety of sentences. We hope that you will now be able to make sentences using this group of words.
