182 KANSAS UNIVERSITY QUARTERLY. 



pie fronds and large pinnules. The apices of the fronds of 

 Glenopterift have a peculiar resemblance to Odontopteris.^ So 

 striking is this resemblance in Glenopteris simplex, that the apex, 

 if found detached, unassociated with the rest of the frond, 

 would probably be taken for a large Odoniopteris ; but the 

 frond as a whole is very different from that genus. There is a 

 resemblance perhaps worth noting between Glenopteris and the 

 smaller species of Megalopteris Dawson in the sessile decurrent 

 pinnules, but the rigid fronds of Glenopteris, with strong axial 

 development, are very different from the fronds of Megalopteris, 

 large, and often bifurcate at the top. 



Glenopteris has, in the shape and development of the frond, a 

 very striking resemblance to the Mesozoic genera Lomatopterls 

 Sch, and Cycadopteris Zigno. The resemblance of the large 

 species of Glenopteris to Lomatoptcris is especially close. The 

 form and method of development of the frond in the two genera 

 are very similar. Both have a strong, roughly striate rachis, 

 and pinnules reduced at the base of the petiolate frond. Lomat- 

 opteris is described by Schimper as having its venation entirely 

 obscured; the venation of Glenopteris is always indistinct, and, 

 in G./ lohata, entirely concealed. The auricled base, which dis- 

 tinguishes most of the species of Glenopteris from Lomatopteris, 

 is wanting in G.? lohata. This latter species further resembles 

 Lomatopteris by a very similar lobation of the borders. The es- 

 sential character separating this species from that genus is the 

 absence of the thickened border. 



Doctor White* has already suggested the possible relation of 

 the Alethopteridete with the Triassic genera Lomatopteris and 

 Cycadopteris. The genus Glenopteris from the Permian having 

 'an evident relation to both Protoblechnum from the base of the Coal 

 Measures, and to Lomatopteris and Cycadopteris from the Trias, 

 makes such a relation much more probable. As far as it is pos- 

 sible to conclude from the evidence of sterile fronds, these three 

 genera seem to have a direct genetic relation. 



Glenopteris splendens, sp. nov. Plate XXXVII, fig. 1; plate XXXVIII, fig. 1; 

 plate XL. Type 5106. 



Fronds large, deeply pinnatifid, slightly curved or straight, 

 coarse, spreading, broadly elliptical, 45 or more cm. long, with 

 a spread of about 20 cm., thick in life, leaving a dark carbona- 



*Bull. Geol. Soc. Am., vol. IV, 1893, p. 119. 



