168 



PLANTS. 



CLASS MONOCOTYLEDONS. 



No. 541. [1207, Cast]. Nipadites Burtini, Brongt. 



This fossil palm-nut is so called from its resemblance to the fruit of the 

 existing Nipa of Bengal and the East Indies. The Nipa is allied to the cocoa- 

 nut tribe on the one side, and on the other to the screw-pine. It is a low- 

 growing plant, luxuriating in marshy tracts at the mouths of great rivers. 

 From the Eocene clay, Schfsrbeck, Belgium, and now in the Ward Collection 

 of the University of Rochester. 



No. 543. Phragmites cretaceous, Lesq. 



Dakota Group (Cretaceous), Ottawa Co., Kansas. 



SERIES CRYPTOGAMIA. 



CLASS ACROG-ENS. 



FAMILY LYCOPODIACE-ffi. 



No. 543. Lepidodendron aculeatum, Sterns. 



The leaf -scars (bolsters) are rhomboidal, in 

 quicunx order, making spiral rows. The inner 

 scar ("cicatrice") bears three points (vascular 

 scars), and beneath it are usually two oval "tub- 

 ercules." A medial keeled line (cauda) runs 

 from the cicatrice to the inferior point of the 

 bolster. Other lines are variably present in 

 different species. 



No. 544. [1325, Cast]. Lepidodendron Sternberg!, Brongt. 



This fine cast of a decorticated specimen shows the original cylindrical form 

 of the stem. Coal Measures, Orange Co., Indiana. Size, 14 x 8. 



No. 545. [1327, Cast]. SigiUaria. 



The leaf-scars (cicatrices) are more variable in form than those of Lepido- 

 dendron, and are disposed in vertical rows upon bands or flutings of the trunk, 

 but still with spiral arrangement. Coal Measures, Pittston, Pa. 



