Genus Pothocites, Paterson. 309 



Stur has described a small Splienophyllum (8. tenerrimum, 

 Ett. MS.*) which also possesses dichotomously divided leaves. 

 But this is easily distinguished from Bornia radiata, Brongn., 

 by the leaves being much smaller and less regularly dichoto- 

 mous. The fruit of this plant has also been described by 

 Stur, and consists of a small Voile mannia-like cone. 



Even on young branches of Bornia radiata the foliage is 

 of considerable size. In the Pothocites from Eskdale (PL XII. 

 fig. 13) we have apparently only the remains of the leaves, 

 little more, indeed, than to show that leaves were given off 

 from the nodal regions of the spike and stem. 



For the purpose of comparison I have given three figures 

 of Splienophyllum tenerrimum ,Ett. MS. (PI. XL figs. 11, 12, and 

 PL XII. fig. 18) ; and as I have been unable to secure good speci- 

 mens of foliage-branches of Bornia (Archceocalamites) radiata, 

 Brongn., I give a copy of a figure by Feistmantel (see p. 310), 

 which shows both foliage and the fragmentary remains of an 

 undoubted fruit of Bornia radiata. This specimen was 

 originally described under the name of Aster ophyllites spanio- 

 phyllus y Feistm.f 



Stur figures two other specimens of fruiting branches of 

 Bornia (Archceocalamites) radiata , Brongn. 



Both of these are very imperfect, and can only be fully 

 understood from an examination of more perfect specimens. 



That on pi. iii. fig. 5 J: represents a Pothocites in a very 

 young state : two entire segments of the fruit are shown ; but 

 the upper part is hidden by a tuft of leaves. 



The foliage arising from the nodal regions of the two seg- 

 ments shows very beautifully its full size and structure. That 

 figured by the same author (pi. iv. fig. 9) is so imperfect 

 that it gives no insight into the nature of the fruit. 



To explain more fully the structure of the fruit of 

 Bornia radiata, Stur gives two figures (enlarged two diame- 

 ters) of the fragment of the spike on Feistmantel's original 



specimen (see p. 311) §. 



His latter figure is a corrected drawing of the former ; hence 

 with it only we have to deal. 



It is so very imperfectly preserved that the original describer 

 remarked regarding it, " a cone-like structure is attached to 



* Stur, Culm-Flora, pi. vii. p. 214. 



t Feistmantel, O. " Das Kohlenkalkvorkommen bei Rothwaltersdorf 

 in der Grafschaft Glatz ynd dessen organische Ein^chliisse," Zeitsclir. d. 

 deutschen geol. Gesellsch. vol. xxv. pi. xiv. fig*. 5, p. 498 (1873). 



t Stur, Culm-Flora, Band L p. 15, fig. 4, Band ii. p. (23) 129, fig. 9 



(1875-7). 

 § Stur, /. c. 



