GENERAL REMARKS. 



595 



importance of examining such forms as Kaulfussia and its 

 allies, Trichomanes etc. And as these bodies in Platycerium, 

 appear to pass into mere stellate hairs, it may be of impor- 

 tance to examine those genera such as Nephobolus, in which 

 stellate hairs are largely developed. 



It would also be desirable to examine accurately the nature 

 of the venation in Taenitis, if it is not strictly continuous, my 

 idea of Blechnum being a dislocated Pteris, is corroborated. 

 There is a tendency to greater perfection of sori towards the 

 circumference ; of this, one of the Achrosticha, figured by 

 Hooker, and Lindsfea Pallens, Wall, (which is not, I think a 

 Lindsa?a,) are conspicuous examples. 



What is the value of an indusium ? to determine this it's 

 origin must be sought out. 



The following genera have been examined in the course of 

 these observations. 



Hemionitis. 



Antrophyura. 



Vittaria. 



Hymenophyllum. 



Trichomanes. 



Cheilanthes. 



Allosurus. 



Cryptogramma. 



Pteris chrysocarpa. 



Pteris. sp. 



Chrysis. 



Adiantum. 



Dicksonia. 



Onoclea. 



Blechnum. 



Woodwardia. 



Doodia. 



Schizotoma. 



