cogener

The large Diadem Spider, which spins so strong a web, that, in pressing my way through the furze thickets, I could hear its white silken cords crack as they yielded before me, and which I found skilled, like an ancient magician, in the strange art of rendering itself invisible in the clearest light, was an especial favourite; though its great size, and the wild stories I had read about the bite of its cogener the tarantula, made me cultivate its acquaintance somewhat at a distance.

I found the head of the flat humerus so characteristic of the extinct order to which the Plesiosaurus has been assigned, and two digital bones of the paddle, that, from their comparatively slender and slightly curved form, so unlike the digitals of its cogener the Ichthyosaurus, could have belonged evidently to no other reptile.