THE FERNS OF NORTH-WESTERN INDIA. 671 
veinlets after entering the lobe; (7) and finally, the fructification is different : 
there is no rigid, straight-backed sorus in A. McDonelli, but, on the contrary, 
the utmost possible liberty and variety of shape. ‘There is generally one sorus 
to each lobe, on the superior veinlet ; but in the lowest lobe there are sometimes 
two, and then the lower is attached to the lower side of the inferior veinlet, and 
the upper to the upper side of the anterior veinlet, so that they are placed baek 
to back, but separated by the space between the two veinlets, All shapes of 
involucre may be found on the same pinnule: short-asplenioid, athyrioid, pear- 
shaped—spreading on both sides of a veinlet without any apparent sinus or 
back at either end, and short-diplazoid—as described above under A. thelypte- 
roides. Beddom2, I think, at first intended to describe A. McDonelli asa 
_Diplazium, and he says it has the habit of the Ceylonese D. Schkurii, and the 
Cuban D. conchatum. It has almost as much right to a place under Diplazium 
as A. japonicum has. The description requires revision by the light of the 
new material from Kashmir. A. Henryi, Baker, from China, is doubtfully 
distinct. 
(To be continucd.) 
