THE FROG — A REPRESENTATIVE VERTEBRATE 423 



Supplementary Reading 



An old, yet ven- valuable reference on the anatomy of the frog is Gaupp's Anatomic 

 des Frosches. A more readily available, though less detailed account is Holmes' Biology 

 of the Frog. Rugh's The Frog, Its Reproduction and Development is an excellent, though 

 advanced, book on the embryology of the frog. Those interested in the taxonomy and 

 natural history of frogs will hnd that the Wrights' Handbook of Frogs and Toads of the 

 United States and Canada, is a rich source book. Many of the references cited at the end 

 of Chapters 22 and 23 also contain much information on the frog. 



