XVIll] 



BOTHRODENDRON 



259 



have only one small pit, but this may not be an original 

 feature. The identification of this plant as Bothrodendron 

 receives support from the discovery of rather more satisfactory 

 specimens at Witteberg sent to me for examination by 

 Dr Schwarzi. These fossils bear a striking resemblance to 

 B. kiltorkense. Gydostigma australe^ Feist, described from 

 the Lower Carboniferous rocks of New South Wales, though 

 too imperfectly preserved to refer with confidence to B. kiltor- 

 kense, is no doubt a closely allied type. 



It. A c' 



Fig. 215. Bothrodendron mundum (Will.). 



A, B. From a specimen (No. 26) in the Cambridge Botany School. 



C. British Museum, Williamson Collection. (No. 416 b.) 



D, E. From a section in Dr Kidston's Collection. 



Reference was made in Volume I. (p. 133) to the so-called 

 paper coal of Carboniferous age from Central Russia, which con- 

 sists of masses of thin strips of cuticle of Bothrodendron stems. 

 The figures published by Zeiller-" show that the plant possessed 

 an epidermis consisting of polygonal cells interrupted by spirally 

 disposed gaps marking the position of leaves ; the gaps measure 

 0"5 — 1"5 mm. in breadth and agree, therefore, with the size of 

 1 Seward (09). = Feistmantel (90) A. -^ Zeiller (80^) A. 



