FOSSILS OF THE PERMIAN SYSTEM. 



PLANTS. 



The Phytological Division of Organic Nature has only a few known representa- 

 tives in the Permian System of England, and these belong exclusively to the lowest 

 classes. 



Sub-kingdom CRYPTOGAMiE. 



Guided by the classification and nomenclature of M. Adolphe Brongniart and 

 Dr. Lindley, it is intended to separate this sub-kingdom into the two large groups or 

 classes, TJiallogencB and Acrogenm, as proposed in the latest publications of these 

 writers.^ 



Class Thallogen^, Lindley. 



Cellulab.es, De Candolle. 



Les Cryptogames Celluleuses, Ad. Brongniart. 



Ceyptophyta, Link. 



Thallophyta, Endlicher. 



AmphigeNjE, Ad. Brongniart. 



Thallogens, Dr. Lindley. 



Diagnosis. — " Stems and leaves undistinguishable."^ (Lindley.) 

 The whole of the plants stationed in this class are remarkable for the extreme 

 simplicity of their structure. They are mere masses of cells, having no wood, properly 

 so called, although in the case of some sea-weeds and funguses, they must acquire 

 considerable age.^ 



' Enumeration des Genres de Plantes cultives au Museum d'Histoire Naturelle de Paris, &c., by 

 M. Adolphe Brongniart, 1843 ; and The Vegetable Kingdom, by Dr. Lindley, 1847. 

 2 The Vegetable Kingdom, p. 5, 1847. 

 8 Idem, p. 5, 1847. 



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