FOSSIL FLORA OF THE STAFFORDSHIRE COAL FIELDS. 87 



fragment of the secondary pinnae shown at the upper part of the specimen bears more 

 broadly lanceolate tertiary pinnae than those seen on the secondary pinnae on the right- 

 hand lower portion of the figure. These latter originate from secondary pinnae 

 which occupied a higher position on the frond than those of the fragment seen at the 

 upper margin of the figure. 



The lower pinnules may bear as many as six lateral lobes, three on each side, and in 

 these the pinnule is more elongated and is distinctly narrower in proportion to its 

 length than those with fewer lobes. These much-divided pinnules are seen on the 

 lower tertiary pinnae at the upper end of the figure. 



Text-fig. 1 (a) shows a pinnule from a short distance above the base of the pinna, 



a 

 Text-fig. 1. — Sphenopteris Kilimlii Kidston. Two pinnules enlarged 12 times. 



and 1 (&) one towards the apex. The frond has probably been of considerable size, for on 

 one of my specimens (No. 1614) what appears to be part of a rachis is 3 "50 mm. thick. 



The surface of the pinnules when seen under a lens has a distinctly roughened 

 appearance. Under higher magnification this is seen to be caused by the large size of 

 the epidermal cells. The same roughened appearance is shown by Zeiller in the 

 enlarged figure he gives of his specimen.* It has not been attempted to represent this 

 character in my enlargements. 



Sphenopteris Kilimlii has a slight similarity to Sphenopteris Schatzlarensis Stur, 

 sp. {pars),}' but this latter species is distinguished from it by its more deltoid pinnules, 



* hoc. cit., pi. i. fig. 15a. 



t Stur included two species under his Hapalopteris Schatzlarensis in Die Fame d. Carbon-Flora d. Schatzlarer 

 Schichten, p. 58. The genus Boweria is founded on specimens similar to Stur : s pi. xl. fig. 1, which has been removed 

 from Sphenopteris Schatzlarensis, so that Stur's specimen given on his pi. xl. fig. 1 can now be distinguished as 

 Boweria Schatzlarensis. The original description of Boweria will be found in Kidston, Mem. Muse'e roy. d'hist. nat. de 

 Belgique, vol. iv. p. 31, 1911. 



