faC . 
388 
DR JOHN M‘LEAN THOMPSON ON THE 
From the foregoing it is apparent that within the genus Nothochlsena the 
eneral condition of the sporangial characters is more primitive and irregular than 
m Trismeria, and a view of near affinity may not reasonably be held to exist 
between them. 
A similar case may be made out with regard to Cheilanthes. Throughout the 
genus the sporangia are typically long-stalked, but the same features which have 
been noted in the capsule of Nothochlsena are recognisable. Irregularities in the 
annulus are, however, less common in Cheilanthes than in Nothochlsena , and are 
marked only in C. vestita, Sw. This species and C. Fendleri, Hk., as noted by 
Marsh (Ann. Bot., 1914, “The Anatomy of some Xerophilous Species of Cheil- 
anthes and Pellsea”), shows the highest spore-numbers recorded for the genus. 
