Group THALLOPHYTA. 

 Class ALG^E. 



The only remains occurring in association with the Glossopteris 

 flora which have any claims to be referred to the Algae, are the 

 somewhat problematical fossils ascribed to the genera Reinschia and 

 Pila by MM. Bertrand & Renault. 



Genus REINSCHIA, Bertrand & Renault, 1892. 



[Bull. Soc. Hist. nat. d'Autun, vol. v, p. 172.] 



The characters of the genus are those of the single species, 

 Reinschia australis. 



Reinschia australis, Bertrand & Renault. 



1892. Reinschia australis, Bertrand & Renault, Bull. Soc. Hist. nat. d'Autun, 



vol. v, p. 172. 



1893. R. australis, Bertrand & Benault, Bull. Soc. Beige Geol., vol. vii, 



Mem., p. 64, pi. v, figs. 23-41. 

 R. australis, Bertrand & Renault, Bull. Soc. Hist. nat. d'Autun, vol. vi, 

 p. 321, pis. iv— vii. 

 1896. R. australis, Bertrand, Bull. Soc. Hist. nat. d'Autun, vol. ix, p. 193. 

 R. australis, Renault, Bass, houill. et perm. d'Autun et d'Epinac : Flor. 

 toss., pt. ii, p. 540, and text-figs. 137-139. 

 1898. R. australis, Seward, Fossil Plants, vol. i, p. 180, text-fig. 36 (3). 

 1900. R. australis, Bertrand, Ann. Soc. Geol. Nord, Lille, vol. xxix,p. 33. 

 R. australis, Zeiller, Elem. Paleobot., p. 35, text-fig. 9. 



Thallus microscopic, gelatinous, free, sac-like, yellow or orange 

 in colour, composed of cells a single layer in thickness, surrounding 

 a central cavity. The thallus varies considerably in size ; from 

 250 yii to 600 /< in length, while the breadth of an average-sized 

 specimen is about 150^. The larger thalli are mammillate or 

 cerebriform. The cells are pyriform, with thick, dense walls. 



The kerosene shales of New South Wales have been studied by 

 MM. Bertrand & Renault, who have shown that they consist very 

 largely of yellow or orange-coloured bodies, in some respects similar 

 to those which occur in the Boghead coals of Europe. These 



B 



