Tempskya ( Eudogenites ). 14 1 
This close resemblance in the spores need not, however, 
point to any near affinity with Trochopteris , which belongs 
to the Schizaeaceae. The spores of Ceratopteris thalictroides 
among the Polypodiaceae or Parkeriaceae have thickenings 
of a similar but not identical type with Trochopteris. Thus, 
though this type of spore-thickening is uncommon, it occurs 
in plants that do not seem to be nearly related to one 
another ; and therefore the resemblance to Trochopteris in 
spore-structure is insufficient, without the evidence of any 
sporangial structure, for referring the fossil spores to the 
neighbourhood of the Schizaeaceae. 
The spores of Dicksonia , which has been compared with 
Tempskya , are nearly smooth, with occasional warts or slight 
ridges. 
There is no evidence that the spores in Tempskya belong to 
the same plant as the adjacent roots. Should any spores 
be found in a specimen containing xylem, it is to be hoped 
that the sporangium would be preserved, and that the attach- 
ment to a leaf stalk might be determined. I am indebted 
to Prof. Judd, Prof. Farmer, and Mr. Seward for assisting 
me with suggestions. 
