Maryland Geological Survey 57*3 



Formation. Burklow's Creek, Delaware ; Cayots Corners, Jones farm, 

 Merrit farm, Cecil County, Maryland. 



Race B. — Matawan Formation. Opposite Post 239, Camp Fox, Post 

 236, Camp U & I, Post 192, Post 157, Chesapeake and Delaware Canal, 

 Delaware. Monmouth Formation. Two miles west of Delaware City 

 on John Higgins farm, Post 156, Chesapeake and Delaware Canal, Dela- 

 ware. 



Pace C. — a! ata wan Formation. Camp U & I, Post 192, upper and 

 lower terranes, Delaware. Monmouth Formation. Two miles west of 

 Delaware City on John Higgins farm, Delaware. 



Pace D. — Monmouth Formation. Brightseat, Prince George's 

 County, Maryland. 



Race E. — Monmouth Formation. Mouth of Turner's Creek, Kent 

 County, Maryland. Rancocas Formation. Noxontown Pond, south 

 side of Appoquinimink Creek, between Odessa and the mill-dam, Delaware. 



Collections. — Maryland Geological Survey, New Jersey Geological Sur- 

 vey, Philadelphia Academy of Natural Sciences, U. S. National Museum, 

 Geological Survey of India. 



Outside Distribution. — "Gryphcea convexa (Say)." Matawan Forma- 

 tion. Marshalltown clay marl, New Jersey. Monmouth Formation. 

 Navesink marl, New Jersey. " Gryphcea mutabilis Morton." Matawan 

 Formation. Marshalltown clay marl, New Jersey. " Gryphcea dissimi- 

 laris Weller." Rancocas Formation. Hornerstown marl, New Jersey. 



" Gryphcea vesicularis Lamarck " sensu Into. Black Creek Formation. 

 North and South Carolina. Peedee Sand. North and South Carolina. 

 Eutaw Formation (Tombigbee sand member). Exogyra ponderosa zone, 

 Alcorn County, Mississippi. Ripley Formation. Exogyra ponderosa 

 zone, Georgia. Exogyra costata zone, Georgia; Tennessee; Wilcox and 

 Pike counties, Chattahoochee River, Eufaula, Alabama; east-central Mis- 

 sissippi; Lee, Pontotoc, Chickasaw and Union counties, Mississippi. 

 Extreme top of zone, Pataula Creek, Georgia; Chattahoochee River, Ala- 

 bama. Selma Formation. Exogyra ponderosa zone, Tennessee; Lee, 

 Chickasaw and Prentiss counties, Mississippi. Exogyra costata zone, 

 Tombigbee River, Wilcox and Sumter counties, Alabama ; Lee, Chickasaw, 



