ox THE FOETAL MEMBKANES OP CHELONIA. 43 



Plate. I. 



Fig. 1. Dorsal view of a Clemmys embryo 2 days old. Zeiss 

 aa X 2. ^"^ ' 



Fig. la. Ventral vie\v of the same, aa x 2. 



Fig. 2. Dorsal view of a Clemmys embryo 4 ^ days old, with 2-3 

 mesoblastic somites, aa x 2. rxxxsix.) 



Fig. 2a. Ventral view of the same. 



Fig. 3. Dorsal view of a Clemmys embryo 4 days old, with 6-7 

 mesoblastic somites. Extra-embryonic cœlomic cavities of 

 two sides distinctly seen almost touching each other ov(!i" 

 the median dorsal line of the embryo, aa x 2. ^"^^-^ 



Fig. 3a. Ventral view of the same, aay.2. 



Fig. 4. Dorsal view of a Clemmys embryo 7 days old. aa x 2. 



(xxxxi.) 



lug. Ö. „ „ „ 8 „ „ aa x 2. 



(XXXXIII.) 



Fig. 6. „ „ „ 9 „ „ aa x 2. 



(xxxix.) 



Fig. 7. „ „ „ 4 ^ „ „ aa x 2. 



(LIII.) 



Plate. II. 



Fig. 8. Clemmys embryo slightly older than Fig. 7. Enlarged. 



(1.) 



Fig. 9. Clemmys embryo 13 days old. aa x 2. (xxvm.) 



