IX] 



PHYLLOTHECA INDICA. 



287 



The specimen represented in fig. 68, A, was originally 

 described by the Italian palaeobotanist Zigno^; it serves to 

 illustrate the points of difference between this genus and the 

 ordinary Equiseium. The open and spreading sheaths clasping 

 the nodes and the erect solitary branches give the plant a 

 distinctive appearance. 



Fio. 68. A. Phyllotheca Brongniarti, Zigno. Nat. size. (After Zigno.) 



B. Calamocladus frondosus, Grand'Eury. (After Grand'Eury.) 



Slightly enlarged. 



C. Phyllotheca indica, Bunb. Part of a leaf-sheath. From a speci- 



men in the Museum of the Geological Society. Slightly 

 enlarged. 



3. Phyllotheca indica Bunb. and P. australis Brongn. Fig. 68, C. 



Sir Charles Bunbury'^ described several imperfect specimens 

 from the Nagpur district of India under this name, biit he 

 » Zigno (56) PI. VII. p. 69. « Bunbury (61). 



