PLATE IV. 



Calamodendron covi/nune. 



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



Fig. 1 (No. 5). Transverse section of one of the Cones or organs of fructifica- 

 tion, showing the central axis, composed of hexagonal and pentagonal vessels, and twelve 

 Sporangia, full of Spore-like bodies ; the four of the lower ones enclosed in two 

 cordate bags. Magnified 4.5 diameters. 



Fig. 2 (No. 6). Transverse section of another Cone, showing the central axis 

 and six processes or spines (Sporangium-bearers) radiating therefrom, and disarranged 

 Spore-cases, formerly connected with them. Magnified 56 diameters. 



