606 SYSTEMATIC PALEONTOLOGY 



later be established which will include either or both P. saffordi and P. 

 lineata, there does not seem at present to be sufficient evidence. 



Occurrence. MATAWAIST FORMATION. Opposite Post 198, Chesapeake 

 and Delaware Canal. Delaware. 



Collections. Maryland Geological Survey, Philadelphia Academy of 

 Natural Sciences, New Jersey Geological Survey, U. S. National Museum. 



Outside Distribution. Matawan Formation. Merchantville clay marl, 

 Marshalltown clay marl, New Jersey. Peedee Sand. North and South 

 Carolina. Eutaw Formation (Tombigbee sand member). Exogyra pon- 

 derosa zone, Alcorn County, Mississippi. Ripley Formation. Exogyra cos- 

 tata zone, Georgia ; Euf aula, Alabama ; east-central Mississippi ; Pontotoc 

 County, Mississippi. Selma Chalk. Exogyra ponderosa zone, Warrior 

 Eiver, Alabama ; Monroe and Chickasaw counties, Mississippi. Exogyra 

 costata zone, Tombigbee Eiver and Sumter County, Alabama ; east-central 

 Mississippi ; Chickasaw, Pontotoc and Alcorn counties, Mississippi. 



PARANOMIA LINEATA Conrad 

 Plate XXXV, Figs. 11, 12 



Placunanomia lineata Conrad, 1860, Jour. Acad. Nat. Sci., Phila., 2 ser., 



vol. iv, p. 291, pi. xlvi, fig. 20. 

 Placunomia lineata Meek, 1864, Check List Inv. Fossils, N. A., Cret. and 



Jur., p. 6. 



Paranomia lineata Conrad, 1867, Am. Jour. Conch., vol. iii, p. 8. 

 Paranomia lineata Whitfield, 1885, Mon. U. S. Geol. Survey, vol. ix, p. 45, 



pi. ix, fig. 10. 



Paranomia lineata Johnson, 1905, Proc. Acad. Nat. Sci., Phila., p. 12. 

 Paranomia scabra Weller, 1907, Geol. Survey of New Jersey, Pal., vol. iv, 



p. 500, pi. Iii, figs. 10-13 (ex parte). 



Description. " Subovate, thin, much compressed, irregular ; lower 

 valve concave, obsoletely radiate; near the summit is a resemblance to a 

 triangular plate inserted in the shell with a raised margin ; this portion is 

 longitudinally minutely striate and resembles one of the opercular valves 

 of a Balanus; upper valve convex, lobed or twisted; radiated with about 

 thirty rugose, slightly raised, subaculeated lines; surface rugose." - 

 Conrad, 1860. 



Type Locality. Tennessee. 



