— 45 — 
either in union or in intimate association with the leaves of these 
genera demand, it seems to me, that they be placed with the Cyca- 
dofilices. 
To the same group I refer also the genera Ottokaria and Der- 
byella, the latter of which I suspect belongs to Gangamopteris. It is 
not improbable that one or moreof the specimens of associated seeds 
was borne by some plant having the leaves of Gangamopteris or 
Glossopteris . 
NEUROPTERIDEA 
Neuropteridium 
Feismantel, Fl. Gondwana Syst., vol. Ill, 1880, p. 84 
The name Neuropteridium was first put forward by Schimper (1) 
to designate a section of Neuropteris with simply pinnate fronds on 
which the pinnules, varying froma nearly round and entire form to 
an oblong, round-lobate type, areal ways broadly attached and decurrent 
on the rachis. 
The lobes are close, curving gradually outward from the strongly 
decurrent base. 
Ths enervation is derived somewhat flabellately from a gradually 
diverging, very oblique bundle which soon vanishes in dichotomizing 
nervilles that curve gently in passing to the border. The type species 
is from the Bunter sandstone of the Vosges; but the most interesting 
and widespread representative of the genus is the Neuropteridium 
validum (Neuropteridium Plantianum) of the Gangamopteris flora. 
The systematic position of the genus is uncertain ; for while Zeil- 
ler’s correlation (2) of the sterile fronds of the Bunter Neuropteridium 
with the fertile fronds, also Triassic, described by Schimper and 
Mongeot (3) as Crematopteris is now generally admitted, the details 
of the sporangia which appear to crowd the surface of the leaf are too 
meager to afford a satisfactory basis for the definite reference of the 
type to either the Filices or the Cycadofilices. The Gondwana species has 
not yet revealed any trace of fructification though it is said to be very 
(1) Traité Pal. Vég., vol. 1, 1869, p. 447. 
(2) E’léments de Paleobotanique, 1900, p. 109. 
(3) Monog. pl. foss. grés bigarré des Vosges, 1844. p. 73. 
