I 7 4 FILICES. 



puts out rays in a stellate manner ; in Botryopteris there is only a simple 

 central strand with a roundish transverse section. The examination of 

 Tubicaulis primarius l seems indeed to show that there were other and 

 much thicker stems with the structure of the leaf-stalk of Zygopteris, for 

 tolerably large fragments of that species have been found which have all 

 the characters of Tempskya (see above on p. 159). 



1 Cotta (1). 



