ILLUSTRATIONS 



Plate I 



From left to right, lizards 1 and 2, Hemidactylus frenatus, male and fe- 

 male, showing a complete absence of calcium deposit in the gland. 

 In No. 2, the calcium shell completely covers the egg substance. Li- 

 zards 3 and 4, dorsal view, are Cosmybotus platyurus, pregnant 

 females, showing large engorged calcium gland on each side of the 

 neck. The last two illustrations show ventral views of lizards 3 and 4, 

 illustrating the extent of the calcium gland on the ventral side of 

 the neck. The eggs are almost fully developed in 3 and 4, and are 

 ready to receive the surrounding deposit of calcium to form the 

 shell. 



Plate II 



[Drawings by V. de los Santos.] 



Fig. 1. Low-power drawing of calcium gland, showing follicles contain- 

 ing an amorphous calcium deposit. X 140. 

 2. High-power drawing, showing cells wandering into the. amorphous 

 . calcium deposit in the follicle. X670. 



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