69 



ISOLOMA: 



Fig. 128, Isoloma diuergens. From left to right: proximal face (x'ioO); lateral, 

 longitudinal view (x 1000); exine stratification. 



JAMESONIA:— 



Fig. 129. Jamcsoiiia imbricata; proximal face, surface and optical section 



(X 1000). 



LASTREA: 



J^'^ 





M- 





J,^J■^4 



S 





^^xJt-r. 



:^if;4^fe 



^k;:i^^js^ 



>;0' 





Fig. l.'JO. Ldslrcd llich/plcris. From left to right: proximal face (x 250); 

 sclerine stratification ( 2000); lateral, longitudinal view (x 1000); LO- 



patterns. 



