140 Canadian Record of Science. 
dividing at the distal end into two sacculi, the dehiscence 
of which seems to have been by asliton the inner side of 
each division. This last property and their form recall the 
spore-cases of the ferns of the genus Archaeopteris, which 
are, however, different in other respects. They still more 
nearly resemble the spore-cases of Psilophyton (see figures 
in my Report on the Hrian Flora of Canada, 1871), but the 
latter are entirely separate and supported upon slender 
stalks. Some tendency to the double or divided form of 
these Sporocarps, though much less pronounced, occurs in 
the Protosalvinia bilobata from Brazil.’ 
I should suppose that these bodies belonged to a genus 
distinct from Protosalvinia, but ordinally related to it. 
The form of the base would seem to imply that they grew 
on a frondose or thick pedicel. Possibly they may have 
been attached to the sides or bases of fronds; but this must 
for the present remain uncertain. 
Williamson has used the generic name Sporocarpon for 
conceptacles of various forms and structures from the carbon- 
iferous, of which he remarks that he has formed no opinion 
of their relations, but which may have been Rhizocarpean, 
inasmuch as the nearest modern analogues of some of them 
appear to be the sporocarps of Pilularia. For this reason 
IT have thought it best to place the present species in this 
provisional genus, till farther information can be obtained 
as to the nature of the other organs of the plant to which 
they belonged. It would now be a very desirable discovery 
to find the vegetative organs of these ancient plants. For 
other facts bearing on the affinities of these organisms, I 
would refer to the papers above cited, and to my little work, 
“The Geological History of Plants.’” 
1 Record of Science, 1884. Bulletin Chicago Academy, 1886. 
2 Appletons, New York, 1888. 
