696 SYSTEMATIC PALEONTOLOGY 



Tellimera eborea Whitfield, 1885, Mon. U. S. Geol. Survey, vol. ix, p. 164, 



pi. xxiii, figs. 12, 13. 



Tellinimera eborea Johnson, 1905, Proc. Acad. Nat. Sci., Phila., p. 16. 

 Tellinimera eborea Weller, 1907, Geol. Survey of New Jersey, Pal., vol. iv, 



p. 21, pi. Ixx, figs. 19(7), 21(?). 



Description. " Equilateral, subtriangular, compressed ; reflexed pos- 

 teriorly, and subangulated ; anterior end rounded; disc with concentric, 

 regular, slightly impressed lines; substance very thin; anterior cardinal 

 tooth slightly oblique, the posterior one very oblique." Conrad, 1860. 



Type Locality. Alabama. 



Shell thin, fragile, polished, compressed, inequilateral, transversely 

 trigonal-ovate in outline; umbones flattened, opisthodetic, conspicuous 

 only by reason of their position at the summit of an angle of not far from 

 100 ; posterior area flattened, the keel rather ill-defined, however, and 

 evanescent toward the ventral margin ; anterior dorsal slope very gentle, 

 the lateral margin rounding evenly into the horizontal base ; posterior 

 dorsal slope very steep, the posterior lateral margin obscurely truncate; 

 external surface sculptured with sharp, concentric striations which are 

 absent in the umbonal region, but grow increasingly deeper toward the 

 ventral margin; ligament external, opisthodetic; hinge with the char- 

 acters of the genus. 



The species superficially resembles sEnona eufalensis Conrad but is 

 more compressed, -more inequilateral and more strongly striated concen- 

 trically. 



Occurrence. MONMOUTH FORMATION. One-half mile east of Millers- 

 ville, Anne Arundel County; Brightseat. Brooks estate near Seat Pleas- 

 ant, 1 mile west of Friendly, 2 miles south of Oxon Hill, Prince George's 

 County. 



Collections. Maryland Geological Survey, Philadelphia Academy of 

 Natural Sciences, New Jersey Geological Survey. 



Outside Distribution. Matawan Formation. Merchantville clay marl, 

 Woodbury clay, Wenonah sand, K"ew Jersey. Cretaceous. Alabama. 



