PLATE XV 



Leopard- or Mbadow-Frog (Rana pipiens). 

 1 An area of eee-masses. Fourteen masses in the illustration. ,^t^c 



2. A stick with !hrTe egg-masses; the two upper globular masses bemg of Rana palustris 



the lower plinth-like mass, Rana pipiens. 



3. A series of meadow-frogs from tadpole to transformed meadow-frog. Dorsal aspect. XI. 



