Plate XXV. Stage XVII.

Plate XXVI. Stage XVII.

Plate XXVII. Stage XVIII; 22, Stage XIX; 23-23b, Stage XX; 24, Stage XXI.

Plate XXVIII. 25, Stage XXII, Alligator Embryo; 26, Stage XXIII, Alligator Just Hatched and Relative Size of Egg.

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