Plate 27. 



Stages in internal budding in Pegantha laevis, sp. nov. 



Fig. 1. Surface (aboral) view of a portion of peronial and ring canal showing budding. 

 X35. 



Fig. 2. A budding ridge or stolon dissected out. Surface view. X 200. 



Fig. 3. Cross section of ring canal in plane of a stolon; (g) mesogloea; (c.c) lumen 

 of the circular canal ; (s.lam) stutzlamella ; (ec) ectoderm ; (en) endoderm ; 

 (v) velum. X 250. 



Fig. 4. Section through a stolon, more enlarged, (ec) ectoderm of canal; (en) endoderm; 

 (s.lam) stutzlamella. X 350. 



Fig. 5. Section through bud formed directly from endoderm (en) of canal. The ecto- 

 derm is not shown ; (s.lam) stutzlamella. X 500. 



Fig. 6. An older bud, in morula stage, lying free in the lumen of the canal. The 

 ectoderm of the canal is not shown. Lettering as above. X 500. 



Fig. 7. Same stage in surface view. 



Cunina species (?) 

 Fig. 8. Budding stolon taken from the gastric cavity of a Solmundella bitentaculata. 

 X 100. 



