1877.] | 165 
{Lesquereux, 
The specimen from Cincinnati, a piece of shale, one or two centimeters 
thick, has on the reverse fragmentary remains of the same plant, especially 
some upper branchlets like fig. 2a, more evidently hooked than those of the 
main stem. Both the upper and lower surface of the shale are smooth, 
have no animal remains ; but the intermediate layers hold small molluscan 
species characteristic of the Cincinnati Group. 
Habitat. Near Covington, opposite Cincinnati, in the Bed of the Licking 
River. Found by Mr. Ed. Ulrich ; communicated by Rev. H. Herzer. 
PsILOPHYTUM CORNUTUM, sp. nov. 
ELL, figel. 
Stem thick, dichotomous; divisions variable in distance, the terminal 
ones short, pointed, nearly equal in size and length ; surface slightly rugose 
and irregularly striate. 
The branches in the lower part are thick cormpenen ely to their length, 
three to four millimetres, irregularly striate when decorticated, or merely 
punctate upon the thin bark, with small projecting dots resembling the 
basilar remains of scales or small decayed leaves ; lateral branches short, 
narrowed to a sharp point; the upper or terminal ones about equal in 
length, appearing like a pair of small pointed horns. 
The species is comparable only to some of the fragments not specified 
but figured by Prof. J. W. Dawson (Geol. Survey of Canada, Fossil Plants 
of the Devonian and- Upper Silurian formations, figs. 243, 244). The 
author remarks, ‘‘that these fragments are probably originating in the 
Upper Silurian of Gaspé ; that as they are found in the lower part of the 
Limestone which underlies the Devonian Gaspé Sandstone and become 
more abundant in the upper beds, this suffices to indicate the existence of 
neighboring land, probably composed of the Silurian rocks, and support- 
ing vegetation.’’ 
From the preservation of its branches even to the smallest subdivisions, 
the specimens here represent part of a plant embedded in the place of its 
growth. The matrice is a piece of very hard calcareous shale, seven to 
eight millimetres thick, bearing on one side irregular undulations like ripple 
marks, without any trace of organic remains, and on the other the frag- 
ments of plants as figured here. The branch in @ represents a different 
species, and indeed a marine or rather a brackish plant, closely related to 
species of the present genus Chorda, Stack. This fragment seems to have 
been mixed in the tide pools with freshwater or land plants growing there. 
For, another thick specimen of the same locality, and compound, bears a 
profusion of marine mollusks, and has only branches of this as yet undes- 
cribed marine species: Calamophycus septus, whose character may as well 
be here fixed.* 
* Genus CALAMOPHYCUS. 
Same characters as the species. 
CALAMOPHYCUS SEPTUS, sp. Nov. 
Fronds simple, cylindrical, elongated, gradually tapering to a point; 
