Note 28 — Chapter XI · THE SPANISH IBEX.
Reading edition
Horns from Nevada are thinner, more compressed laterally, and the ridges show the spiral curves less distinctly. It is, after all, the old question of what constitutes a species.
Reading edition
Horns from Nevada are thinner, more compressed laterally, and the ridges show the spiral curves less distinctly. It is, after all, the old question of what constitutes a species.