32 Mr R Kidston m the 



were given off from the nodal regions of the spike and 

 stem. 



For the purpose of comparison I have given tliree figures 

 of Spheno2yhyUum tenerrimum, Ett. MS. (Plate III. figs. 11, 

 12, and Plate IV. fig. 18) ; and as I have been unable to 

 securegood specimensof foliage-branchesof Bornm (ArchcBO- 

 calamites) radiata, Brongn., I give a copy of a figure by 

 Feistmantel (see p. 6), which shows both foliage and 

 the fragmentary remains of an undoubted fruit of Bornia 

 radiata. This specimen was originally described under the 

 name of Astero^jhyllites spanio2'>1ujUus, Feistm.'" 



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 plate iii. fig. 5 t represents a Pothocites in a very 



young state : two entire segments of the fruit are sliown, 



but the upper part is hidden by a tuft of leaves. 



The foliage arising from the nodal regions of the two 

 segments shows very beautifully its full size and structure. 

 That figured by the same author (plate 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 

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

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

 specimen (see p. 7). | 



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 the upper end of the present example, which 

 may perhaps belong to it as a fructification ; but, owing to 

 its indistinctness, a closer investigation is impracticable." § 

 Stur gives a very full description of his figure of this 

 fragmentary cone of B. radiata, of which the following 



* Feistmantel, 0. — "Das Kolilenkalkvorkonncen bei Rothwaltersdorf in der 

 Grafschaft Glatz und dessen organische Einscliliisse," Zeitschr. d. dentschen geol. 

 Gescllsch., vol. xxv. , pi. xiv. fig. 5, p. 498 (1873). 



tStur, Culm Flora, Band i. p. 15, fig. 4; Band ii. p. (23) 129, fig. 9 

 (1875-7). 



:J: Stur, loc. cit. § Feistmantel^ loc. cit., p. 498 



