348 THE AMERICAN NATURALIST. [Vor. XXXIX. 
The type material was collected originally by Dr. Wm. Bullock 
Clark at Grove Point, Maryland. Similar material has been col- 
lected in a different leaf-bed on Grove Point by Bibbins and 
Berry, who also collected it in less abundance at the Deep Cut 
of the Chesapeake and Delaware Canal in Délaware. In over- 
hauling my collections from Cliffwood, N. J., I found three small 
fragments, hitherto undescribed, which are identical with the 
specimens from further south. I now have twenty-two speci- 
mens of this form from the Grove Point locality, five from Deep 
Cut, and three from. Cliffwood. Five specimens were recently 
collected by the writer from the west bank of Cheesequake 
Creek one-half mile southwest from Morgan Station. 
It has seemed best not to press the comparison with other 
species from widely different geological horizons too closely. 
Our species might readily enough be correlated with almost any 
of the thirty-nine species of Cyperacex which Heer describes 
from the Miocene of Switzerland, and the resemblance is also 
very close to some of theleaves which Saporta refers to Poacites 
(e.g. P. antiquior, tenellus, cercalinus). So much confusion 
results from identifying as common, forms widely separated, 
either geologically or geographically, when the determinations 
are based upon any but the most complete material, that it has 
seemed best to describe the American remains as a new species, 
as I have no doubt it really is. 
Passaic, N. J. 
