424 Lesquereux's Descriptions of 



nerves obsolete, surface covered with short appressed hairs ; 

 fruit dots placed only at the upper part of the pinnules, few, 

 two ranked, large, oval. 



59. Pecopteris notata (spec. nov.). Frond tripinnate ; 

 secondary pinnae horizontal, short, linear-lanceolate, obtuse ; 

 pinnules short, oval, or half round, united nearly to the 

 middle ; terminal leaflet large, oval, obtuse ; nervules strongly 

 marked, forking once, attached at an acute angle to the 

 undulate medial nerve, rachis striate ; fruit dots very small, 

 punctiform, irregularly placed along the nervules and between 

 their branches. 



60. Pecopteris pusilla (spec. nov.). Frond bipinnate ; 

 pinnae oblique, linear, nearly decurrent on a broad, flexuous, 

 and winged smooth rachis ; pinnules very small, united above 

 the middle, oval, hairy, the lowest a little larger ; nervules 

 simple, obsolete. 



61. Pecopteris concinna (spec. nov.). Frond bipin- 

 nate ; pinnae open, with an undulate rachis ; pinnules about 

 one inch long, oval, lanceolate, narrowed at the base and 

 sessile, distant and perpendicular to the rachis, pinnately 

 undulate, lobed ; medial nerve undulate ; secondary nerves 

 pinnately forking three or four times in each lobe ; nervules 

 simple. 



62. Pecopteris decurrens (spec. nov.). Frond bipin- 

 nate ; pinnae opposite, superior ones terminal by the forking 

 of the rachis ; pinnules distant, oval, oblong, obtuse, entire, 

 contracted above the base on the upper side, dilated on the 

 lower, and decurrent on the broadly winged rachis ; medial 

 nerve undulate, scarcely broader than the lateral ones which 

 are simple, or once forked, arched ; primary rachis flat- 

 tened, broad, enlarged at the articulations of the pinnae. 



63. Pecopteris incompleta (spec. nov.). Frond bipin- 

 natifid ; pinnae very oblique, scarcely open, lanceolate ; pin- 

 nules oval, or nearly round, decurrent, united at the base, 

 very oblique ; the superior one very small, and the terminal 

 wanting by the elongation of the secondary rachis pointing 



