IX] 



PHYLLOTHECA INDICA. 



287 



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

 described by the Italian palaeobotanist Zignoi; it serves to 

 illustrate the points of difference between this genus and the 

 ordinary Equisetum. The open and spreading sheaths clasping 

 the nodes and the erect solitary branches give the plant a 

 distinctive appearance. 



Fig. 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. Fhyllotheca indica Banh. and P. australis Broiagn. Fig. 68, C. 



Sir Charles Bunbury^" described several imperfect specimens 

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

 1 Zigno (56) PI. vii. p. 59. ' Bunbury (61). 



