DEVELOPMENT OF THE SWIFT. 
DEVELOPMENT OF THE SIX-LINED LIZARD. 
Photographs show the eggs, and the various stages of dev elopment of the embryos during an interval 
of six or eight weeks ; at time of deposition of the egg, it contains a well-formed embryo. 
z : ‘ 2 RST 
Pearl and Duane a] 
PHOTOGRAPHS- 
' ELWIN R. SANBORN. 
EGG OF THE GILA MONSTER. 
Photograph of an egg from a specimen in the Reptile House. 
