KIDSTON : THE FLORA OF THE CARBOXIFEROUS PERIOD. 219 
Plate XXXII. 
Fig. 1. Mariopteris muricata Schl. sp. Monckton Main Colliery, 
near Barnsley. Middle Coal Measures [2393]. Three- 
fifths natural size. Collected by Mr. W. Hemingway. 
Fig. la. Portion of pinna with pinnules to show the nervation. 
Magnified twice. 
Fig. 2. Alethopteris lonchitica Schl, sp. Monckton Main Colliery, 
near Barnsley. Middle Coal Measures [1959]. One 
quarter natural size. Collected by Mr. W. Hemingway. 
Fig. 3. Alethopteris lonchitica Schl. sp. Blairpoint, Dysart, Fife. 
Lower Coal Measures [2816]. Portion of a pinna 
enlarged twice to show the nervation. 
