2 Weiss, Xaiophyton radiculosum (Hick). 



of Coal Measure Plants. They are Nos. 148-162 of the 

 Cash Collection and No. 171 in the Hick Collection. 



A careful examination of these slides leads me to 

 support the view expressed by Williamson that the 

 plant was of stigmarian character, and certain features 

 revealed by the preparations warrant, I think, a further 

 identification of this Stigmaria as the " root " or rhizome 

 of a LepidopJiloios, probably of LepidopJdoios fuliginosus. 



The external view of the specimen, with its quin- 

 cuncial arrangement of rootlets, as shown in Fig. i of 

 Hick's paper, is very suggestive of a Stigmaria, and, 

 though the transverse section is at first sight different 

 from that of the more common forms of Stigmaria, yet 

 on a closer examination it will be found that the differ- 

 ences are differences of proportion rather than of kind. 



Hick's Fig. 2 was based partly upon a photograph 

 and partly on a diagrammatic drawing. Fig. i of the 

 present paper is a photograph by Mr. Abraham Flatters, 

 from another transverse section, which will be seen to be 

 very like that figured by Hick. It differs chiefly in the 

 splitting open of the vascular cylinder by the intrusion of 

 one of those ubiquitous stigmarian rootlets, which is also 

 visible by the side of the vascular cylinder in Hick's 

 drawing. 



Besides the central stele, Fig. i shows very clearly the 

 general character of the middle cortex ("radicular tissues" 

 of Hick), with its curious marking, the outer cortex with 

 its large and clearly defined cells, and the periderm lying 

 imbedded in the outer cortex. 

 I. The pith. 



The presence of a well-defined pith, described and 

 figured by Hick, is the first character of some difference 

 from the usual specimens of Stigmaria. The numerous 

 specimens examined by Williamson ('87) were all hollow 



