214 LL. Lesquereux on the Coal Formations of North America, 
tion makes a link of union between the Pecopteridee and the 
Sphenopteride, containing, as before said, some species referred 
y Brongniart to the genus Pecopteris. Of this section we have 
in our coal-measures: Sphenopteris paupercula Lsqx., (Geol. Rep. 
of Ill. ined. pl. 5, fig. 4 and 4a,) related to Pecopteris Shoenleiniana 
Bret. Sphenopieris spec. nov. (ined.), distinguishable from Pecop- 
teris Murrayani Brgt. only by the slightly pointed and once-toothed 
lobes of the pinnules that in the European species are roundish 
and entire. Sphenopteris abbreviata Lsqx., S. plicata Lsqx., 
species established from a too small and incomplete specimen 
with nerves entirely obliterated and perhaps referable to Pecop- 
teris Pluckneti Brgt.; Sphenopteris intermedia Lsqx., Sp. Davalhana 
Gépp, Sp. Dubuissonis Brgt., Sp. Gravenhorstit Brgt., and Ap. 
flagellaris Lsqx. I would even join to this division Alethopteris 
serrula Lsqx., a beautiful species that has some relation of form 
and nervation with this last one and that has no natural affinity 
with Alethopteris. j 
2d. Cheilanthoides Gipp. Frond bi-tripinnate with sometime 
entire, mostly pinnately lobed pinnules. Nerves pinnate am 
secondary nerves mostly geminate in each lobe and forked neat 
the top. Our American species of this.section are : Sphenoplers 
latifolia Brgt., Sp. acuta Brgt., Sp. obtusiloba Brgt., Sp. irregulars 
Sternb., Sp. polyphylla Ll. and Hutt., Sp. glandulosa Lsq%- 
x 
Sp. squamosa Lsqx. 
8d. Davalloides Gipp. Frond bi-tripinnate, pinnules or lobes 
of the pinnules wedge-form; nerves oblique, ascending, single ™ 
nopteris tridactylites Brgt., Sp. spinosa Gdpp., Sp. distans Sternb. 
j a d Sp. rigida Brgt. 
If the American species do not throw any new light on 
genus Sphenopieris, scantily represented in our coal-measures : 
is I think different with those referable to the genus Hymen yt 
lites Gbpp. 
This genus is nearly related to existing species of ym 
phyllum and Trichomanes. According to Gdppert, it _has rt a’ 
characters : a frond bi-tripinnate, either irregularly cut-iobe hi 
innatifid, with the divisions decurrent on a filiform ™° r" 
erves pinnate or dichotomous, simple in each lobe or excurrel 
F uded to 
i 
llum 70 
two different typical forms to which both the proposed sect? 
i 2 ee + s : : + divisi 
Wire Reka ee, De emer! Ee of — 
