Page:Natural History, Reptiles.djvu/227

Rh at their points; a row of triangular spots runs down each side; a mark somewhat like a V is on the hind head, and between the eyes is a large central dark patch. The species is subject to much variety in colour, from white with black marks, to deep black, in which the marks are visible only in the play of light. It may be readily distinguished from the Common Snake by its zig-zag band, by its darker belly, by its wider head, and in particular by its short and abruptly tapered tail.

The Viper, as its name imports, is viviparous;

or rather the membrane which invests the egg is so tender, that it is ruptured in the moment