24 



PLANT LIFE. 



Fig. 31. 

 Fig. 30. — One ccenocyte from a branch of Cladophora, shi 



chloroplasts ; /;, pyrenoids ; a, starch-grains; «, nuclei. 



After Strasburger. 

 Fig. 31 — Part of a plant of Caulerpa. See text, r 29. Two-thirds natural size. 



—After Sachs. 



i-ing fifteen nuclei, ch. 

 Magnified 270 diam. — 



Fig. 32. — Acetabular ia. A, an entire plant, natural size —After Woronin. A, dia- 

 grammatic longitudinal sec linn through the upper end of the stalk and the um- 

 brella-like circle of crowded branches which grow together ; «, scars left by fall of 

 an earlier whorl of short branches ; r, w, rudimentary branches ; C, the base of 

 stalk showing rhizoids for attachment, _/", and for storage, b. Magnified 20 diam. — 

 After De Bary and Strasburger. 



