808 ROYAL SOCIETY OF UANADA 
In Ward’s most recent contribution to the Mesozoic flora of North 
America, he publishes a description and figures of a species of Nilsonia 
from Thompson Creek, Douglas County, Oregon. This he identifies 
with N. nipponensis, which Yokoyama had previously described from 
Japan, and which Ward thinks may be also comparable with various 
Jurassic species from Siberia, which Heer has described under the 
names of Pterophyllum and Anomozamites (57: p. 94, pl. xvii, f. 8-10). 
On comparing our specimen with those figured by Ward, a very striking 
resemblance is to be noted with respect to individual pinnules, but it 
is to be observed that within the limits of the same leaf, the pinnules 
show a somewhat wide variation of such a nature that taken individually, 
several species might be made from the parts of one leaf. It is, there- 
fore, quite possible that our specimens are really representative of 
N. nipponensis, but as such a conclusion is not wholly justified by the 
nature of the material now in hand, it is thought that a separate name 
to be employed tentatively, would be altogether more appropriate, and 
it has, therefore, been named with respect to the locality from which 
it was derived. 
1430 
1 CYCADITES UNJIGA, Dn. 
Under number = are included several fragments of pinnate 
leaves with strong and rigid, linear and conspicuously nerved pinnæ 
given off from the main rachis at angles of 65° to 70°. The angles 
thus indicated deviate somewhat from those given by Dawson (9) in 
his description of Cycadites unjiga, but in this species, as in C. con- 
fertus, Murr., from the Jurassic of India, it is obvious that the angles 
of the pinnæ cannot be relied upon for diagnostic purposes, because 
cf the positions assumed as the result of displacement. A careful com- 
parison with the original text shows that if the angles are to be relied 
upon, the descriptive text is to be taken as erroneous and should be 
recast. Both Dawson’s specimens and those now under consideration, 
are closely comparable with C. pungens, Lesq. (43), from the Dakota 
Group, and it is altogether probable that future comparisons upon the 
basis of more complete material, will show them to be identical. 
In the 1903 collections, several specimens represented by the 
numbers 14b, Te. He show pyritized fragments of leaves occasionally 
with a strong midrib, were originally determined as representing 
the pinnæ of a Cycad. This they no doubt are, and it may now be 
1430 
assumed that they represent the same species as Fr of the 1905 
collections. 
