7 Pages in Charles Darwin's Library associated with "fauna - toad"

Essay on the physiognomy of serpents
By: Schlegel, H. (Hermann),
Publication info: Edinburgh, Maclachlan, Stewart & Co, 1843
Pages: Page 198 Page 198 Page 207 Page 207
Naturgeschichte der Saeugethiere von Paraguay
By: Rengger, Johann Rudolph.
Publication info: Basel, Schweighauser, 1830
Pages: Page 199
On the genesis of species
By: Mivart, St. George Jackson,
Publication info: London, Macmillan & Co, 1871
Pages: Page 109 Page 148