FOSSIL PLANTS. 
383 
riculata , Brgt., a plant which has not yet been discovered in our Coal Meas¬ 
ures. The two specimens figured in this Report, have been found in the con¬ 
cretions of Mazon creek, the first one, fig. 5, by Mr. John Collins, to whom the 
species is dedicated. Other and larger leaflets of the same species have been 
obtained from the same place. 
, Neuropteris capitata, Sid. nov. 
^ w ' PI. vii, fig. 1, and PI. viij, fig. Ojb— ^ 
3 ^Frond or part of frond bi-pinnately divided, triangular in 
^outline or tapering upwards from an enlarged base ; pinnae 
^-linear, with alternate, oblong, short, very obtuse, broad, con- 
j/ J ‘r l , tiguous pinnules, and a proportionally very large triangular 
^^nbtusely pointed terminal leaflet, obtusely lobed on each side 
near its base. Medial nerve, none; veinlets scarcely visible 
to the naked eye, coming out from the narrowed base of the 
leaflets, strongly arched towards the borders, with numerous 
bifurcations. At the upper part, or near the point of the 
frond, as seen in PI. vii, fig. l,the pinnae become shorter, less 
divided, and at last mere pinnules attached to the rachis by a 
broad pedicel. All leaflets are unsymmetrical at the base, 
being auricled or elongated downwards, or toward the main 
rachis, and merely rounded on the other side. 
The general appearance of this species is somewhat similar to that of Ncu- 
ropteris Loschii , Brgt., from which it is readily distinguished by its propor¬ 
tionally broader, round-topped pinnules, more abruptly cut at the base, its pol¬ 
ished smooth surface, and the large terminal triangular leaflet. The large spe¬ 
cimen figured is from Murphysborough ; the other has bt en found in concre¬ 
tions at Mazon creek. The same species is abundant in the roof shales of the 
main four-feet coal bed at Yellow creek, Ohio. 
