PLATE V. 



Calamodendron commune. 



All the specimens in this Plate are from the Upper Brooksbottom Seam of Coal. 



Fig. 1 (No. 7). Longitudinal section of a Cone, showing seven Receptacles, 

 Scales, and Sporangium-bearers, connected with the column or central axis, and 

 Sporangia full of Spore-like bodies. Magnified 1 3^ diameters. 



Fig. 2 (No. 8). Longitudinal section of a Cone similar to the last, showing eight 

 Receptacles and Sporangium-bearers, connected with the column or central axis, and 

 Sporangia containing Spore-like bodies. Magnified 14 diameters. 



Fig. 3 (No. 9). Longitudinal section of a single Receptacle with its two scales ; 

 and a tangential section of four cordate Sporangia, two of them containing dark 

 coloured Spore-like bodies. Magnified 1 9 diameters. 



Fig. 4 (No. 10). A longitudinal section of part of another Cone, showing the 

 structure of the Scales and Sporangium-bearers, and the connection of both those 

 parts with the column or central axis. Magnified 24 diameters. 



Fig. 5 (No. 11). A longitudinal section of part of another Cone, showing the 



Scales and Sporangium-bearers, connected with the central axis or column, and the 



Sporangia, in their natural position, full of Spore-like bodies. Magnified 18 

 diameters. 



Fig. 5a (No. 11). A longitudinal section of a single Sporangium full of Spore- 

 like bodies, taken from No. 1 1 Specimen. 



Fig. 55 (No. 11). A longitudinal section of a portion of the central axis or 

 column of No. 11, showing the oval openings in the walls of the tubes. Magnified 

 130 diameters. 



