Plate VI. 



Fig. 1. — Dorsal view of an embryo of Chelonia caouana a few hours after its deposi- 

 tion. Zeiss aaX2 (Bia) 



Fig. 1«. — Ventral view of the same. aaX2 



Fig. 2. — Dorsal veiw of an embryo of Chelonia caouana \\ days after its deposition. 

 The lateral parts of the embryonic shield are not represented. Zeiss 

 aaX2 (Dla) 



Fir,. 2(;. — Ventral view of the same. aaX2 



Fig. 8. — Dorsal view of an embryo of Chelonia canuana 1^ days after its deposition. 

 Only a small part around the primitive plate is represented. aax2 (C2) 



Fig. 3«. — Ventral view of the same. aax2 



Fig, 3. /»/.v.— Dorsal view of an embryo of Chelonia caouana about 2 days old. Only 

 a small part around the primitive plate is represented. aaX2 (O?) 



Fig. 'Sa, bis. — Ventral view of the same. aax2 



Fig. 4. — ^Dorsal view of an embryo of Chelu)iia caouana 1\ days after its deposition. 

 Only a small part around the primitive plate is represented. aa=2. (B4a) 



Fig. 4(/. — Ventral view of the same. aaX2. 



