Fossil Vegetation of America. 379 
Sphenopteris dilatata, crassa and obovata, of Lindley and 
Hutton, are, I think, properly classed by Unger with Cyclopte- 
ris; and it is probable that several other Sphenopterides must 
share this fate. : 
Cyclopteris digitata, Brongn., tab. LXI bis, and tab. LXIV. 
of Lindley and Hutton, is certainly, as Brongniart well 
imagines, the leaf of a Conifer resembling Salisburia. The 
curving in of the margin of the petiole, previous to its expan- 
sion into the leaf, is a character which, in my mind, sets the ' 
question at rest. And, if so, other Cyclopterides may be the 
same, some even of the Odontopterides are liable to the like 
suspicions, and Brongniart has lately expressed an opinion that 
oeggerathia is also a Conifer. 
Beinertia, of Góppert, Gatt. Foss. Pfl., tab. XVI. fig. 5, 
of which many of the veins originate in the rachis, is, I think, 
wrongly placed by Unger among the Pecopterides. I have 
- Sven a figure (d, plate XXXV.) of a fragment from Mansfield, 
Mass., which resembles Góppert's figure of this fossil in every- 
thing but the divisions of the pinnules, these being deeper in 
my specimen than in Gópperts. I think this belongs to 
Neuropterides, | 
The numerous family of Pecopteris, of Brongniart, depend- 
ant almost on a single character, is evidently susceptible of 
à much more lucid arrangement ; and, although this has been 
effected to a considerable extent by Unger, in his Synopsis, it 
5 yet capable of amelioration. Pecopteris, of Brongniart, is 
the most difficult division to identify: to do it successfully, 
"equires numerous specimens, with much patience and labori- 
ous study, 
"3T or Fossi, VEGETATION FROM American LOCALITIES. 
«  CALAMARIÆ. Unger, Syn. Pl. Foss. 
= the orders Caramrres and Equisetites I have several 
‘Pecimens from Nova Scotia and from Mansfield ; they are, 
ever, so small that I prefer to pass them over at present. 
