Lesquereux. ] 328 {March 1, 
CorDAISTROBUS, Lesqx. 
Strobile conical, tapering to a point, covered by transversely rhomboidal 
scars, placed in spiral, bearing narrow linear leaves, with the characters, 
form and nervation of leaves of Cordaites. 
The plant from which this genus is established might have been de- 
scribed perhaps as Cycadoidea or Mantellia, a genus established for the 
description of stems of Cycas, mostly globular, or conical obtuse, or nest 
form, all referable to a more recent formation, the Permian. As the leaves 
are of a different character, as also the reference of this cone to Cycadw is 
merely indicated and not positively ascertained, I think advisable and more 
rational to describe it under this new genus, which indicates its relation. 
CoRDAISTROBUS GRAND’ EURYI, sp. nov. 
PIE TE fige 3: 
Cone cylindrical from the base to the middle, narrowed npwards and 
acuminate, borne upon a somewhat thick pedicel or axis equally striate in 
the length; scars transversely rhomboidal, inflated in the lower part, bear- 
ing at the top another smaller rhomboidal scar point of attachment of 
linear leaves, marked by parallel distinct nerves. 
The leaves are short, mostly broken near the point, one only preserved 
in its whole on one side; of the other, four are left, close to each other, all 
evidently attached to the rhomboidal scars of the cone. The scars show 
the spiral disposition of the leaves. The nervation of the leaves seen in 
3a, is exactly of the Cordaites character. The primary nerves are close, 
especially toward the borders, and separated by one or two intermediate 
veins. The axis of the cone, as far as it isseen upon the specimen, is 
covered by a comparatively thick coaly bark more than half a millimeter 
thick. It is deeply and regularly striate, the striz being also obscurely seen 
along the middle of the cone, even to its point, by compression of the scars, 
as represented upon the figure. 
I consider this cone as proving more than any other of the organs de- 
scribed, the relation of Cordaites to Cycade. By the leaves it is a true 
Cordaites ; by the scars and their disposition it represents a small stem of 
Oycas. It is, however, difficult to explain its true nature. It does not 
look like a fruiting cone, and all that is known until now of the stems of 
Cordaites is without relation to this branch. Dr. Newberry has repre- 
sented, loc. cit., as Antholithes priscus, a branch of Cordianthus, bearing 
small recurved gemmifer cones, to which are appended short leaves which 
seem as originating from under the scales. This is the only organism 
which might perhaps explain the nature of this strobile by supposing a kind 
of viviparous vegetation produced directly from the flowering cones of 
Cordaites. Though it may be, that its relation, as remarked above, is clearly 
marked as a point of connection between Oordaites and Cycade. 
Habitat. Cannelton. Mr. I. F. Mansfield. 
DICRANOPHYLLUM,? Grand’ Eury. 
The author has described under this name linear narrow leaves of vari- 
ous length, twice forking at the top, coriaceous, marked with a few thick 
