JURASSIC FLORA OF DOUGLAS COUNTY, OREG. 87 



Sagenopteris grandifolia Fontaine n. sp. 

 PL XV, Figs. 4, 5. 



A single imprint and its reverse of what must have been a very large 

 leaf was obtained from locahty No. 7. It is evidently a Sagenopteris 

 quite different from either of the two above described. Unfortunately 

 the fragment is too small to show the size and shape of the leaf. It is a 

 portion of the upper part of a leaf and shows the margin on one side, a 

 portion of the midnerve, and some of the secondary nerves. The width 

 of the part preserved is 35 mm., indicating a leaf at least 7 cm. wide. 

 The midnerve extends well up in the leaf. The secondary nerves are 

 very strong, unusually remote, and flexuous. The anastomosis is more 

 open and less frequent than in either S. G(}ppertiana or S. paucifolia. 



PL XV, Fig. 4, gives the only fragment seen, and Fig. 5 an area drawn 

 to show the nervation. 



Family MARATTIACE^. 



Genus DANiEOPSIS Heer. 



DANiEOPSis Storrsii Fontaine n. sp. 



PI. XV, Figs. 6-9. 



Three specimens of a veiy fine fertile fern were found by Mr. Storrs 

 at locality No. 14. It has been found nowhere else. The fructification 

 is so near that of the living Dansea that it might be placed in that genus. 

 As, however, Heer's fossil genus Danseopsis has a similar fructification, 

 I prefer to place it in that genus. All three specimens seem to have 

 belonged together, being separated in sphtting the rock. The part fig- 

 ured has been mutilated, so as to separate what was once a continuous 

 fragment of an ultimate pinna extending from well down on it to near 

 its termination. The size of this indicates that the entire pinna must 

 have had a very considerable length, for the part preserved has a length 

 of 105 mm. This pinna evidently formed one of a number that were once 

 attached to a common rachis. The larger or normal pinnules are about 

 25 mm. long and 7 mm. wide. On the specimen figured they are distorted 

 and crowded together by pressure, causing them to appear unduly narrow. 

 In form they are oblong-linear and they are more or less falcate. The 

 tips are obtuse to subacute. They maintain the same width from the 



