PLATE XXIV. 



Stiffmaria ficoides, Lindl. and Hutton. 



Fig. 1 (No. 45). The exterior of a decorticated specimen, from the Lower Coal- 

 measures of Lower Darwen, Lancashire, showing corrugated hues and depressed areolae, 

 the latter with a circular central elevation, being the outside of the bell-shaped cavities 

 containing the vascular bundles communicating with the rootlets. Natural size. 



Pig. 2. Transverse view of the centre of the rootlet, showing the ring of lax 

 cellular tissue, and the vascular bundle in the middle. Magnified 90 diameters. 



Pig. 3. Section, partly transverse and partly longitudinal, showing the ring of 

 cellular tissue and the transversely barred vessels of the vascular bundle in the middle. 

 Magnified 90 diameters. 



Pig. 4 (No. 46). Side view of a specimen from the Lower Coal-measures, near 

 Bradford, Yorkshire, showing four main roots. Much reduced. 



Pig. 5. Under view of the base of the same specimen, showing the crucial sutures. 

 Much reduced. 



Fig. 6 (No. 47). Side view of a specimen from the Lower Coal-measures, near 

 Bradford, showing four main roots. Much reduced. 



Pig. 7. Under view of the base of the same specimen, showing the crucial sutures. 

 Much reduced. 



Fig. 8. A portion of the exterior of one of the main roots, showing the 

 corrugated lines and depressed areolae, usually found on the outside of Stigmaria. 

 Much reduced. 



