40 ROYAL SOCIETY OF CANADA 
SAGENOPTERIS OBLONGIFOLIA, n. sp. 
Lower Cretaceous of Alliford Bay, Q.C.I. 
An incomplete specimen from Alliford Bay shows all the char- 
acteristics of Sagenopteris, but of a type not hitherto described. The 
single pinna is 22 mm. broad, and in the complete state it was appar- 
ently about 5 em. long. In outline it is regularly oblong-elliptical 
with a rounded base and possibly also a rounded apex, but in the 
absence of the upper portion, this can only be assumed from the 
general trend of the sides. The midrib is obscure except at the 
extreme base. The anastomosing of the venation is distinct, and 
the veins are divergent from near the base. The diagnosis of this 
species would be as follows: — 


Fic. 2.—SAGENOPTERIS OBLONGIFOLIA. 
Pinne regularly elliptical-oblong, about 5 cm. long and 22 mm. 
wide; the base rounded; midrib obscure except near the base; margin 
entire; the anastomosing venation divergent from near the base. 
The elliptical form at once suggested the propriety of the name 
elliptica, but this was found to have been retained by Fontaine for 
another species from the Potomac Formation, distinguished by its 
oblong-lanceolate form. The present species may therefore be desig- 
nated as 8. oblongifolia. 
