PLATE 2 



EXPLANATION OF FIGURES 



8 Higher magnification of a section through the same gland as shown in the 

 preceding figure. 



9 Section through a dorsal gland of a 15-em. embryo, drawn under medium 

 magnification. 



10 Portion of the wall of the gland shown in figure 9, as seen under moderately 

 high magnification. 



11 Portion of the wall of a dorsal gland of a 1-meter alligator, as seen under 

 moderately high magnification. 



12 Transverse section through the cloacal region and penis of an alligator 

 embryo of about 7 cm. total length. The early invagination of the epithelium 

 of the cloaca to form the cloacal glands is shown, eg. 



13 A higher magnification of the cloacal gland shown on the left side of the 

 cloaca in the preceding figure. 



14 Section, through the penis and cloaca of an embryo somewhat more devel- 

 oped than the one represented in figures 12 and 13. The cloacal gland, eg, is 

 more deeply invaginated than in the preceding stage. 



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