88 

 PLAGIOGYRIA: 



-' .V, 



Fig. 163. Plagiogyria henryi. 

 From left to right: lateral view 

 ( X 250); proximal face ( x 250); 

 distal face (x 250); sclerine 

 stratification (x 2000). 



PLATYCERIUM:— 



Fig. 1C)4. Platyceriiim madagascariense. From left to right: proximal face 

 (x 250); lateral view (sm-face and optical cross-section; x 1000); sclerine 



stratification {--^ 2000). 



PLATYZOMA: see Fig. 114 D, p. 63. 



POLYBOTRYA:— 



Fig. 165. Polyhotryn appendiculnta; a, lateral, transverse view (x 250); 

 b, lateral, longitndinal view (snrface and optical section, x 1000); c, proxi- 

 mal face (X 250); upper left-hand detail: sclerine stratification (x 2000). 



