El autor ve o mejor dicho imagina el antepasado común del caballo. Nada que Lamarck no hubiese hecho mejor décadas antes.       244   What now are we to say to these several facts? We see several distinct species of the horse genus becoming, by simple variation, striped on the legs like a zebra, or striped on the shoulders like an ass. In the horse we see this tendency strong whenever a dun tint appears—a tint which…