262 



PTERIDOPHYTA. 



[CH. 



sporangia apparently resembling those of an Equisetum. There 

 are no sterile appendages or bracts alternating with the sporo- 

 phylls ; and the absence of the former suggests a comparison 

 with Equisetites rather than Galamites. Grand'Eury refers to 

 the fossil as " parfois a peine perceptible," and a recent exami- 

 nation of the specimen leads me to thoroughly endorse this 

 description. It was impossible to recognise the features repre- 

 sented in Grand'Eury 's drawing. Setting aside this fossil, there 

 are other strobili recorded by Renault^ and referred by him to the 



Fia. 57. A. Equisetites Hemingwayi Kidst. From a specimen in the 



British Museum. | nat. size. B. Diaphragm and sheath of an Equise- 



taceous plant, from the Coal -Measures. | nat. size. From a specimen in 

 the British Museum. 



' Eenault (93) PI. xlii. figs. 6 and 7. 



