220 SYSTEMATIC PALEONTOLOGY 



Class ANGIOSPERM AE. 



subclass MONOCOTYLEDONAE. 



Monocotyledon gen. et sp. ? 

 Plate LXX, Figs. 8-11. 



Description. — These fragments are evidently portions of some mono- 

 cotyledonous plant. Figs. 9 and 11 apparently represent the upper or 

 outer part of the leaf blade, Figs. 10 and 12 the base. The nerves are fine, 

 distinct, and separate below or at the middle of the leaf (Fig. 11) curv- 

 ing and running together above or near the margin (Fig. 9) Some at 

 the basal portion of the leaf have the appearance of being forked (Figs. 

 10, 12), but this may be due to lateral compression. In dried herbarium 

 specimens, parallel-veined leaves often present this appearance and the 

 upper portion of Fig. 10 strongly suggests such a condition. Somewhat 

 similar remains are figured by Heer, from the Miocene of Spitzbergen, 

 under the name of Alisma macro pliyllum (Fl. Foss. Arct., vol. iv, pt, 

 i, p. 66, pi. xxvi, xxvii) ; from Eriz, Switzerland, as Aronites dubius (Fl. 

 Tert. Helvet. vol. i, p. 98, pi. xlvi, fig. 5) ; and from the Baltic provinces 

 as Zingiberites undulatus (Mioc. Bait. FL, p. 64, pi. xvii, figs. 1-3). 

 Comparison may also be made with Musophyllum complicatum Lesq. 

 (Tert. FL, p. 96, pi. xv) but the Maryland specimens are too fragmentary 

 for even generic determination. 



Occurrence. — Sunderland Formation. Near the headwaters of Is- 

 land Creek, Calvert County. 



Collections. — Maryland Geological Survey. 



subclass DICOTYLEDONAE. 

 Order JUGLANDALES. 



Family JUGLANDACEAE. 



Genus JUGLANS Linne. 

 JUGLANS ACUMINATA Al. Br. ? 



Plate LXXII, Fig. 15. 

 Juglans acuminata Al. Br., 1845, Neues Jahrb., p. 170. 

 Description. — This specimen is probably referable to the above species 

 as may be seen by comparison witli those figured by Heer (Fl. Tert. 



