238 MESOZOIC FLORAS OF UNITED STATES. 



Sagenopteeis ? sp. Fontaine. 

 PL LXV, Fig. 46. 



1894. Sageno'pteris sp. ? Font, in Diller & Stanton: Bull. Geol. Soc. Am., Vol. V, 



p. 450 (nomen.). 

 189.5 [1896]. Sagenojyteris sp. Font, in Stanton: Bull. U. S. Geol. Surv., No. 133, 



p. 1.5 (nomen.). 



At locality No. 9 occur several impressions of a fern which is appar- 

 ently a Sagenopteris, but the leaflets are too imperfect and the ner-\^ation 

 is too poorly shown to permit its specific character to be made out. The 

 character of the anastomosis of the nerves is similar to that of S. eUiptica, 

 of the Lower Potomac of Virginia, but the nerves are stronger. This 

 plant may be identical with some of the ferns with reticulated nervation 

 in the Great Falls flora that Doctor Newberry placed with great hesitation 

 in the genus Chiropteris. He seems to have separated them from Sage- 

 nopteris, with which genus, as it seems to me, they best agree, solely on 

 account of the sparing anastomosis. But this, in the Great Falls fossils, is 

 hardly less frequent than in S. eUiptica of the Lower Potomac, and Doctor 

 Newberry's Chiropteris spatulata is much like Sagenopteris eUiptica. 



Genus HAUSMANNIA Dunker. 



Hatjsmannia ? CALiroENiCA Fontaine n. sp. 



PL LXV, Fig. 47. 



A single specimen of a plant of doubtful character was found at 

 locality No. 18 in the Knoxville beds. It is a portion of the lower part of a 

 leaf that seems to have narrowed to its base. As the full width of the leaf 

 is not preserved and the margin is apparently not entire in any portion, it 

 is not possible to determine its original form. The plan of the nervation 

 indicates a flabellate and digitatel}^ lobed leaf, but if it were lobed after the 

 fashion of Hausmannia it was not cut into such narrow lacinise as Dunker's 

 Hausmannia cKchotoma," for the fragment obtained, although not so broad 

 as it was originally, shows no subdivision, and it is wider than any of the 

 segments of Dunker's plant. The nervation shows several nerves of equal 

 strength and not diminishing in size by division. These nerves converge 

 toward the base of the leaf so as apparently to unite, while in the opposite 



n Monogr. d. Norddeutsch. Wealdenbildung, p. 12, pi. v, fig. 1 ; pi. vi, fig. 12. 



