22. A photograph of a still larger embryo, removed from the shell and freed from the fetal membranes. × (about) 1. 23. A photograph of a still more advanced embryo, in which the digits are quite evident and the scales are beginning to show. × (about) 1. 23_a_. A sagittal section of an embryo of the age of the one represented in Figure 23; the tail has not been shown in this figure. × (about) 3. 23_b_. A vertical section through the head of an embryo of about the size (perhaps slightly smaller) of the one shown in Figure 23. × (about) 3. 24. A photograph of an older embryo in which the pigmentation of the scales is evident, though not shown in the figure. × (about) 1. 25. A photograph of an embryo in which the pigmentation and the development of the body form are practically complete. The allantois, unabsorbed yolk, etc., have been removed. × (about) ³⁄₄. 26. A photograph of a just-hatched alligator, of an alligator egg, and of a young alligator in the egg just before hatching. × (about) ³⁄₇. [Illustration: PLATE VI. _1_, _1a_, THE EGG; _2_, _2a_, STAGE I.] [Illustration: PLATE VII. _2b_-_2f_, STAGE I. _3_, _3b_, STAGE II.] [Illustration: PLATE VIII. _3a_-_3g_, STAGE II.] [Illustration: PLATE IX. _3h_-_3o_, STAGE II.] [Illustration: PLATE X. STAGE III.] [Illustration: PLATE XI. _6_-_6i_, STAGE III; _7a_, STAGE IV.] [Illustration: PLATE XII. _7b_-_7h_, STAGE IV; _8_, _8a_, STAGE V.] [Illustration: PLATE XIII. STAGE V.] [Illustration: PLATE XIV. _8i_-_8j_, STAGE V; _9a_-_9g_, STAGE VI.] [Illustration: PLATE XV. _9h_-_9m_, STAGE VI; _10_, STAGE VII.] [Illustration: PLATE XVI. _10a_, STAGE VII; _11a_-_11d_, STAGE VIII.] [Illustration: PLATE XVII. STAGE VIII.] [Illustration: PLATE XVIII. _11i_-_11k_, STAGE VIII; _12_-_12b_, STAGE IX.] [Illustration: PLATE XIX. _12c_-_12g_, STAGE IX; _13a_-_13c_, STAGE X.] [Illustration: PLATE XX. STAGE X.] [Illustration: PLATE XXI. _13g_, STAGE X; _14_, STAGE XI; _15_-_15c_, STAGE XII.] [Illustration: PLATE XXII. _15d_-_15f_, STAGE XII; _16_-_16d_, STAGE XIII.] [Illustration: PLATE XXIII. _16c_-_16g_, STAGE XIII; _17_, STAGE XIV.] [Illustration: PLATE XXIV. _17a_-_17g_, STAGE XIV; _18_, STAGE XV; _19_, STAGE XVI.] [Illustration: PLATE XXV. STAGE XVII.] [Illustration: PLATE XXVI. STAGE XVII.] [Illustration: PLATE XXVII. STAGE XVIII; _22_, STAGE XIX; _23_-_23b_, STAGE XX; _24_, STAGE XXI.] [Illustration: PLATE XXVIII. _25_, STAGE XXII, ALLIGATOR EMBRYO; _26_, STAGE XXIII, ALLIGATOR JUST HATCHED AND RELATIVE SIZE OF EGG.] BIBLIOGRAPHY 1. ADAMS, A. L., _The Wanderings of a Naturalist in India_. Edinburgh, 1867. 2. ANDERSON, A., “An Account of the Eggs and Young of the Gavial (_G. gangeticus_),” _Proc. Zoöl. Soc._, 1875, p. 2. 3. BALFOUR, F. M., _Comparative Embryology_, vol. 2. 4. BATTERSBY, J., “Crocodile’s Egg with Solid Shell,” _Nature_, vol. 48, no. 1237, p. 248.