KIDSTON 
THE FLORA OF THE CARBONIFEROUS I'ERIOD. 
211 
Plate XXYIII. 
Fig. 1. Odontopteris alpina Presl sp. Moiickton Main Colliery, 
near Barnsley. Middle Coal Measures [1962], Three- 
fiftlis natural size. Collected by Mr. AY. Hemingway. 
Fig. In. Portion of pinna enlarged to sliow the nervation. 
Fig. 2. Annulate fern sporangia, in section, Pettycur, Fife [Slide 
No. 550]. Magnified 50 times, a. Annulus. 
Fig. 3. Xenropteris gigantea Sternb. Hill Top Colliery, Skegby, 
near Hiechnael-under-Huthwaite, Notts. [206]. Three- 
fifths natural size. Middle Coal Measures. Collected 
by Mr. E. Wilson. On the main rachis, as at «, are 
seen the small cyclopteroid pinnules. 
Fig. 4. Renaultia microcarpa Lesqx. Blairpoint, near Dysart, 
Fife. Lower Coal Measures [773]. Collected by Mr. 
James Bennie. Pinnule showing the fructification 
enlarged. 
Fig. 4a. Sporangium more highly enlarged to show the structure. 
