Fossil Floras of Cape Colony. 57 



(with Taniopteris), 28e, 29e, 30e, 32e, 33e — several fragments, oi:ie 

 showing the apical portion of a pinna; 35e, 36e — a good specimen 

 of a forked portion of a frond; 42e, 43e, 309d, including a good 

 impression of the apex of a pinna, 310d, 312d, 313d, 315d, 316d, 

 475d, 476d, 478d, 479d. 



Thinnfeldia rhomboidalis Ettingshausen. 

 Plate VIII., fig. 1. 



1852. Tliinnfeldia rhomboidalis Ettingshausen, Abk, k.-k. geolog. 



Eeichs. Wien, Bd. I., Abt. iii., p. 2, pi. i., figs. 4-7. 

 1867. Thinnfeldia decurrens Schenk, Foss. Plor. der Grenzschichten, 



p. 114, pi. xxvi., figs. 1-5. 

 T. rhomboidalis, ibid., p. 116, pi. xxvii., figs. 4, 5. 



Similar in habit to Thinnfeldia odontopteroides, but characterised 

 by the longer broadly linear segments decurrent by the lower margin 

 on the rachis, the upper edge of the base being separated from the 

 rachis by a distinct sinus ; a well-marked midrib giving off oblique 

 forked veins, the lower basal portion of the segments contains a few 

 curved veins which enter the lamina direct from the rachis. 



The single fragment from Stormberg represented in pi. viii., fig. 1 

 may belong to a larger pinna of Thi?infeldia odontopteroides, or it 

 may be included under Ettingshausen's species ■'■ as more clearly 

 resembling the Steierdorf examples than the typical forms of Morris's 

 species. 



Schenk's figures of T. rhomboidalis + represent specimens which 

 cannot be distinguished from that shown in pi. viii., fig. 1. An 

 example of Thinnfeldia from the Burrum Coalfield, Queensland, 

 referred by Jack and Etheridge \ to T. media Ten. -Woods, is probably 

 identical wdth T. rhomboidalis. 



Plate VIII., fig. 1 (C). 



This fragment shows very clearly the form and venation of the 

 segments ; the agreement between this specimen and Schenk's 

 Thinnfeldia decurrens is exceedingly close. A fragment of Stenop- 

 teris elongata (Carr.) is seen resting on the Thinnfeldia. 



* Ettingshausen (52), pi. i. 



t Schenk (67), pi. xxvii., figs. 4, 5. 



J Jack and Etheridge (92), pi. xviii., fig. 10. 



