[B3]

G. says he can certainly recognize the males of most snakes, for instance the English snakes, not only by the lesser size of the male but by their more [insertion:] Snakes strongly pronounced traits; thus the black zigzag line as the male viper is more distinctly defined.

? same manner he can recognise the male [tailless] batrachians; he showed me an S. American species in this male of which there were 2 black dots & some black bars bars on male. He knows of no conspicuous difference in colour in these or in snakes.

Such slight differences can hardly be due to sexual selection, but they would serve as the foundation. Wallace's view of protection applies only to colour & perhaps to [illeg].

 

[B3v]

In male batrachians, the vocal organs much more developed in the males & permanently.

These [illeg] variable sounds are chiefly smaller by the [few words illeg]

The vocal organs are [5 lines illeg]