﻿94 



PEOF. A. C. SEWARD 0:S 



[Feb. 1908, 



fig. 1 & PI. V, fig. 1. The three pintmles attached to a piece of rachis 

 shown in fig. 3 D (p. 91) serve as examples of a passage, from several 

 slightl3'-divergent veins springing direct from the rachis, to a type 

 of venation characterized hy a midrib giving off forked secondary 

 veins. 



In his Tongking Flora, Prof. Zeiller figures some pieces of pinnae 

 which he names Pecopteris (Bernoullia 2 ) sp.^ : these bear so close a 

 resemblance to entire or slightly-lobed segments of Tli. odonto- 

 pte7'oides\\\e those figured in text-fig. 4 (p. 93), that one is inclined 

 to suggest a specific identity. It is noticeable that, in the Swiss 

 Keuper fern Bernoullia helvetica, as figured by Heer - aud by 

 Dr. Leuthardt,^ the venation is distinct from that of Thinnfeldia, 

 The smaller examples of Th. odontopteroides also agree very closely 

 in habit with Cycadopteris hderopliylla^ Zig., as figured by 

 Dr. Raciborski ^ from Poland and by De Zigno ' from Jurassic rocks 

 of Italy. The fossil described by Prof. Szajnocha as Canliopteris 

 Zuheri "^ from Rhsetic rocks of Cacheuta in the Argentine Republic 

 should in all probability be referred to the larger form of TJi. 

 odontopteroides or to Zeiller's Tongking species Ctenopteris Sarrani. 

 A comparison may also be made with Th. indica var. media, figured 

 by Mr. Shirley ' from the Ipswich Beds of Queensland ; and vrith 

 Th. odontopteroides var. normalis ^ of the same author, which is 

 probably identical with the larger form of the South African plant. 

 Specimens which may be identical with Tit. odontopteroides are 

 recorded by Feistmantel ^ from more than one locality in India. 



TniXIfFELDIA SPHENOPTEROIDES, Sp. UOV. (PI. lY, fig. 2 & PL V^ 



fig. 2.) 



The collection includes two specimens which are referred, with 

 some hesitation, to Thinnfeldia ; the larger of the two is from the 

 Molteno Beds of Konings Kroon (PI. V, fig. 2), and a second 

 specimen (PI. lY, fig. 2) was obtained from the Burghersdorp 

 Beds, 2 miles west of Gala, on the Gala River. I am inclined to 

 regard these specimens as specifically identical. The specimen 

 represented in PL lY, fig. 2 has a fairly-broad rachis Q'b centimetres 

 long, giving off alternate pinnae at a wide angle. The upper pinnae 

 bear entire pinnules which reach a length of 8 millimetres ; faintly- 

 preserved secondary veins are given off from a midrib at an acute 

 angle. The lower pinnae have acuminate segments with a serrate 

 edge, the teeth forming in some cases distinct pinnules. This 

 specimen occurs on the reverse side of the rock upon which the 



^ Zeiller (02) p. 34 & pi. i, figs. 14-16. 



- Heer (76») pi. xxxviii, figs. 1-6. 



^ Leuthardt (04) vol. xxxi & pis. xix-xx. 



4 Raciborski (94) pi. vi, fig. 28. 



^ Zigno (56) vol. i, p. 158 & pi. xviii ; see also Saporta (73) pi. lix. 



6 Szajnocha (88) p. 233 & pi. ii, fig. 1. 



7 Shirley (98) pi. v, fig. 1. 

 ** Ibid. pi. xi. 



9 Feistmantel (81) p. 85 & pi. xxiii a, figs. 7-9. 



