166 Miscellanies. 
Cancer triloboides in this Journal, Vol. XXI, p. 137. That name 
is strictly appropriate ; but, it being referable to the same genus with 
the two species just named, I prefer labelling it, in my own collection, 
Brongniartia carcinodea.* J sent specimens of this species to M. 
Brongniart about eighteen months since. He remarked to the bearer, 
that this species seemed to form the connecting link between the fos- 
sil trilobite and living crab. 
I have now before me a specimen of what appears to be a living 
trilobite, collected on the beach at Cape Horn, by Dr. James Eights, 
of Albany. It certainly appears to be of the same genus and very 
closely resembling in most specific differences, the fossil specimens 
from the Mohawk. Dr. E. has, what I believe to be another spe- 
cies of trilobite, which he found at New Zealand. Both of these 
he will soon publish with figures, when it will be seen, that the lon- 
gitudinal divisions consists of series of undulations, without grooves, 
like the species which I have referred to the proposed genus Brong- 
niartia. A. Eaton. 
Rensselaer School, March 6, 1832. : 
7. Diluvial scratches on Rocks. 
Extract of a letter written by John Ball, Esq., of Lansingburgh, N. Y. 
“While on a mountain in Hebron, New Hampshire, I was sur- 
prised to find scratches on the rocks, as though made by some heavy 
body dragged over them. ‘They were uniformly in the same direc- 
tion, and, judging by the eye, about S. 60° E., N. 60° W. The 
scratches appeared on all parts of the mountain, and very distinctly 
when the soil had been lately removed. ‘The mountain is principally 
gneiss, and the strata inclining a little to the west from a vertical po- . 
sition. I afterwards found that most of the mountain rocks, in that 
vicinity, show similar scratches. At the time, I was not aware that 
any thing of the kind had been noticed by others. But on looking 
into the American Journal of Science, a few days after, [ found my- 
self not the first observer of what I deemed a very striking phe- 
nomenon.” f 
* Kapxivog, crab, 00g, appearance. 
t See Vol. XX, p. 124. 
