FONTAINE. ] THE OROVILLE FLORA. 351 
Genus ANGIOPTERIDIUM Schimper. 
ANGIOPTERIDIUM CALIFORNICUM Fontaine. 
Pl. LV, Figs. 2-5. 
1896. Angiopteridium californicum Font.: Am. Jour. Sci., 4th Ser., Vol. II, p. 274. 
Two fragments of a fern that seems to be an Angiopteridium were 
found at the locality ‘‘In the bed of a ravine that leads from the 
Banner mine,” ete. One of these is the fragment of the middle por- 
tion of a sterile pinnule. This is 25 mm. wide. It has very distinct, 
but slender, lax, and rather remote lateral nerves that go off at a large 
angle from the midrib, curve away from it, and then, near the margin 
of the lamina, bend slightly toward the tip of the pinnule. In general 
aspect the fragment looks much like Zawndopteris orovillensis, but the 
nerves are quite different. The lateral nerves leave from a common 
point on the midrib, and then are either single or fork at varying 
distances from the midrib, but only once, and mostly halfway between 
the midrib and margin. The branches are, approximately, parallel. 
This sterile form resembles somewhat Angiopteridium nervosum Font., 
of the Potomac formation of Virginia. 
The other fragment seems to be the fertile form of the same species 
as the sterile portion just described. It has the same nervation as the 
sterile fragment, and is the imprint of a portion of a frond, about 
2 em. wide in its widest portion. The imprint shows a length of 
85 mm., with the basal and terminal portions not preserved. It bears, 
at the margins of the pinnule, elliptical ‘sori of large size. They are 
carried on the ends of the lateral nerves. 
This fertile form resembles Angzopteridiwm Me Clellandi (Oldh. and 
Morr.) Schimp. It should be stated that the sterile form is a good 
deal like that depicted by Feistmantel on pl. xlvi, fig. 5, of the 
Jurassic. Flora of the Rajmahal Group, which he supposes is a 
form of A. Mc Clellandi. 
Pl. LV, Fig. 2, gives the sterile form, and Fig. 3 an enlarged 
fragment to show the nerves. Fig. 4 represents the fertile form, and 
Fig. 5 an enlarged portion to show the sori. 
