DEVELOPMENT OF THE SWIFT. 



DEVELOPMENT OF THE SIX-LINED LIZARD. 



Photographs show the eggs, and the various stages of development of the embryos during an interval 



of six or eight weeks ; at time of deposition of the egg, it contains a well-formed embryo. 



photographs 



EGG OF THE GILA MONSTER. 

 Photograph of an egg from a specimen in the Reptile House. 



