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) stutzlarnella ; (ec) ectoderm; (en) endoderm; 



(v) velum. X 250. 

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



(s.lam) stutzlarnella. X 350. 

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



derm is not shown; (s.lam) stutzlarnella. 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. 



