IX, ©, 8 Campbell: Macroglossum Copeland 223 
sporangia in both genera forbid their close association with 
Danaea, and indicate their inclusion in the family Angiopterideae. 
The most obvious difference between M. Alidae and M. Smithii 
is in the number of sporangia in the sorus, this being about 
twice as great in M. Alidae where there may be upwards of 60. 
Some of the smaller sori in M. Smithii are scarcely longer than 
is sometimes found in Angiopteris. The sporangia of M. Alidae 
Fic. 4. Apex of the sporangium showing the annulus, an. A, Macroglossum Alidae; B, M. 
Smithii; C, Angiopteris. x 250. 
are somewhat smaller and more crowded, so the resemblance 
of the sorus of this species to Danaea is specially marked. 
(Plate I, A). 
The leaf-lamina in M. Alidae is somewhat thicker than in 
M. Smithii, and there are in M. Alidae obscure pseudo-nerves 
between the veins, which are absent in M. Smithii. Finally the 
true annulus in the sporangium of M. Smithii, and the less 
developed indusium, distinguish it from M. Alidae. 
