IO4 LEWIS E. GARY. 



PLATE II. 



FIG. 7. A section through a laceration piece soon after its separation from the 

 parent. 



FIG. 8. Part of a vertical section through a young bud to show the formation 

 of the stomodeum. 



FIG. 9. Part of a longitudinal section through a young laceration embryo, 

 such as is shown in Fig. 4, Plate I., to show the downgrowth of the ectodermal 

 lining of the stomodeum to form the mesenteric filaments. 



FIGS. 10, n, 12 (with FIGS. 13 and 14, PLATE III.). A series of sections at 

 different lev-els taken through the same embryo to show the relation of the new to 

 the old mesenteries. (The orientation is the same in all the figures.) 



