PLATE 9. 



Fig. 1. 66. 2. Phytopsis cellulosum. {^^E- 39.) 



1. Base or root of one of these fossils, with its diverging and slightly ascending branches. The surface, not 

 being worn, presents no marks of structure. 



1 a. A part of the specimen presents the longitudinal fibres, with very distant transverse fibres. 



1 4. A longitudinal section, passing nearly through the centre of the stem, showing the longitudinal and trans- 

 verse fibres. 



1 c. Portion of two stems with the cuticle removed, showing the structure. 



1 d. Oblique sections near the termination of branches, presenting stellate or cruciform cells. 



1 o ( in part), presents quadrangular cells, arranged diagonally to the direction of the stems. These forms may 

 arise from weathering, or solution of cellular partitions in forms like 1 d. 



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