no 



GIGASPERMUM (Fig. 217 B), LORENTZIELLA (Fig. 217 A): 



B 



p^-o^ 







m 





Fig. 217. Gigaspermaceae. — A, Lorentziella paragiiensis; sclerine stratifica- 

 tion (X 2000) and LO-patterns. B, Gigaspennum repens; sclerine stratification 



(X 2000) anil LO-patterns. 



HEDWIGIA (Fig. 218 A), HEDWIGIDIUM (Fig. 218 B):— 



Fig. 218. Hedwigiaceae. — A, Hedwigia cilintd; from left to right: proximal 



face (X 250); spore in lateral view {>' 1000); LO-patterns. B, Hedwigidium 



integrifoliam; from left to right: proximal face (x 250); spore in lateral view 



(X 1000); LO-patterns. (From Erdtman in Svensk hot. Tidskr. 1954.) 



HEDWIGIDIUM: see Fig. 218 B. 



HELICOPHYLLUM:— 



ij ? 



Fig. 



219. 



. .^. _^,.. HelicophyUnin torqiuitiiin; a, LO-patterns, proximal face; b, LO- 

 patterns, distal face; the central figure shows the proximal face of a spore, 

 surface (left) and ojitical section (right; x 1000). 



