p. 2

Althopteris lonchitidis Sternb.
Lesg. Geol. Penn. 2 p 864

Pecopteris lonchitica, Bronguant
Hist. Veg. Foss. pl. 84 Lin. HcH. Vol. 2 p. 197 pl. 153

P. blechnoides, Brongn. Alethopteris
lonchiticus & A. vulgatior, Sternb. Filicutes lonchitious Schloth. See also Am. Jour. Sc. vol. 29 p. 34 & 105 pl. 4 fig. 8, pl. 18 fig. 47, & pl. 30 fig. 4.
Ortripinate

Bifinnated; lobes long narrow, usually decurrent, contracting, however, at the base towards the lower part of the punoe; accute, acuminate, or rather obtuse; towards the end of the pinnoe they become confluent, diminishing very much in size, and at last ending in a long lobe, resembling those at the base of the pinnoe both in size & form; all strongly marked by the midrib, on which are placed almost perpendicularly a number of close fine veins, usually simple, but sometimes forked.

-When the primules are decurrent, it is the A. lonchitidis- when rounded at the base the A. vulgatior.