MARYLAND GEOLOGICAL SURVEY 759 



as preserved, but rather coriaceous in life, with slightly wavy margins. 

 These branches are not preserved for lengths of more than a few centi- 

 meters, during which interval they are observed to divide but once or not 

 at all. They have the appearance in some specimens of radiating from a 

 common center, but as their proximal parts are invariably missing this 

 supposition cannot be verified. 



The Maryland remains are rare and in the form of impressions, along 

 which recent rootlets have often permeated the argillaceous matrix, some- 

 times giving the specimens the appearance of having midribs. The North 

 Carolina remains, which are abundant in the Black Creek beds at certain 

 localities along the Black River, often show considerable carbonaceous 

 residuum indicating that in life the thallus was of considerable con- 

 sistency. 



Occurrence. MAGOTIIY FORMATION. Bound Bay, Anne Arundel 

 County. 



Collection. U. S. National Museum. 



PTERIDOPHYTA 



Order LYCOPODIALES 

 Family LYCOPODIACEAE 



Genus LYCOPODIUM Linne 

 [Sp. PL, 1753, p. 1100] 



LYCOPODIUM CRETACEUM Berry 

 Plate L, Figs. 10, 11 



Lycopodium cretaceum Berry, 1910, Amer. Jour. Sci., 4th ser., vol. xxx, pp. 



275, 276, figs. 1-6. 

 Lycopodium cretaceum Berry, 1914, Prof. Paper, U. S. Geol. Survey, No. 



84, pi. ii, figs. 1-6. 



Description. Spikes loosely imbricated, of modified foliage leaves or 

 bracts. The largest spike, which is nearly complete, is 5 cm. in length and 

 5 mm. in diameter, and is probably somewhat flattened, the bulk of the 

 specimens indicating somewhat smaller dimensions. Axis stout. Bracts 

 several ranked, peduncled, with a cordate or retuse base and an abruptly 



