MARYLAND GEOLOGICAL SURVEY 483 



Occurrence. — Calvert Formation. Chesapeake Beach. 

 Collection. — Maryland Geological Survey. 



Spiroloculina tenuis (Czjzek). 

 Plate CXXXITI, Fig. 13. 



Quinqueloculina tenuis Czjzek, 1847, Haidinger's Naturw. Abhandl., vol. ii, p. 149, 

 pL xiii, flgs. 31-34. 



Description. — The test of Spiroloculina tenuis is in small delicate speci- 

 mens Spirolocnline from beginning to end, but in larger forms it shows a 

 thickening at the center on account of the earliest segments not being 

 set in one plane, and it is probably on this account that the species has so 

 often been grouped with Quinqueloculina. It has a rather broadly oval 

 contour in our Miocene specimen and the several chambers are smooth 

 and run in alternate series from end to end. 



Fossil specimens are met with throughout the European Tertiaries and 

 in existing seas it inhabits all great ocean basins and according to Brady 

 it is especially abundant in the South Pacific. It occurs at all depths 

 and good specimens are met with at considerable depths. 



Occurrence. — Choptank Formation. Pawpaw Point. 



Collection. — Maryland Geological Survey. 



PLANT/E. 

 PHANEROGAMIA. 



Class ANGIOSPERM/E. 



Subclass DlCOTYLEDONEy^. 



Order FAGACEylE. 



Genus QUERCUS Linne. 



Quercus lehmanii n. sp. 



Description. — Leaves small, narrow, about 1.3 in. long by 0.5 in. 

 maximum width, irregularly lobed; lobes short, acuminate or wedge- 



