234 THe Ottawa NATURALIST. [March 
inframarginals on the bridge) in Baéna hatcheri and Baéna marshi 
it is possible that these two species may be found to be referable 
to Boremys rather than to Baéna. 
Supramarginal shields are described as occurring in Progano- 
chelys quenstedti, Baur, from the Upper Trias (Keuper) of Wur- 
temberg. They are stated to be present in Platychelys obern- 
dorfert, Wagner, of the Upper Jurassic of Bavaria, although in 
the figures of the carapace it is not made clear to what extent 
they are developed. Also they are found in the living Macro- 
clemmys temmincki (Alligator Turtle) of the Mississippi and 
Missouri valleys. 
The presence of supramarginal shields in the carapace of this 
Cretaceous species is regarded as an archaic character handed 
down from earlier forms. The presence of six costal shields on 
each side also appears to be a stage in the gradual reduction of 
the total number of shields of the carapace. 
BOTANICAL BRANCH. 
On the evening of January 4th, the following members of the | 
Botanical Club met at the residence of Mr. A. E. Attwood: Prof. 
Macoun, Dr. Ami, Dr. Blackadar, Messrs. W. T. Macoun, R. B. 
Whyte, T. E. Clarke, W. C. Ewing, and D. A. Campbell. 
The greater part of the evening was devoted to discussing 
the merits of a plan or key for the easy identification of the ferns 
of Ontario. It was decided to test the efficacy of the so-called 
popular key next summer. 
Some time was devoted to microscopic work, after which Dr. 
Ami showed a large number of specimens of fossil fruits collected 
some years ago in the State of Vermont. Dr. Ami has written an 
interesting account of these fossil fruits, and his paper will appear 
in a future number of THE OtTTawa NATURALIST. 
A. E. A, ~ 
