252 GRAY—ABNORMAL SPOROCARP OF SALVINIA NATANS. 
have no reason for supposing that Salvinia originally had sori 
composed of both microsporangia and aie Sood sis ce oe the 
behaviour of Azolla suggests such a supposition.” 
“ Moreover, Heinricher found on one occasion in Salvinia natans 
a sporocarp which contained some megasporangia among a 
number of microsporangia.” 
There may have been some peculiarity in the material supplied, 
as this feature seemed less rare in it than in that examined by 
those who have investigated these plants. I had two other 
examples of it among the sporocarps I examined, and of these 
I am positively certain that one at least was a case similar to 
that shown. I may mention that no normal female sporocarps 
have been found in this material to my knowledge. But this is 
negative evidence, and some may yet be found. If we take 
it that the material is. quite normal, the repetition of instances 
is an important support to the supposition that this is merely 
a reversion to a more primitive state of hermaphroditism—once 
the ordinary condition in the Hydropteridez. 
My thanks are due to Mr. W. E. Evans, who.was kind to 
make the excellent photographs reproduced on Plate xlviii. 
EXPLANATION OF THE FIGURES IN PLATE 
XLVIII. 
Illustrating Mr. Gray’s Note on “‘ Sporocarp of Salvinia.’ 
Fic. A. Normal sporocarp. 
Fic. B. Abnormal sporocarp. 
