PROCEEDINGS OF THE UNITED STATES NATIONAL MUSEUM 



issued l^jSvA- QJmI ^y '^* 



SMITHSONIAN INSTITUTION 



U. S. NATIONAL MUSEUM 

 Vol.90 Washington: 1941 No. 3113 



PAMLICO FOSSIL ECHINOIDS 



By WiLL.\RD Berry 



H. G. KicHAEDS, in his report on the Pamlico formation of the 

 Southern Atlantic Coastal Plain,^ records the occurrence of Mel- 

 lita quinquiesperforata (Leske) from the Inter-Coastal Waterway 

 between Pungo and Alligator Kivers, Hyde County, N. C. ; Core 

 Creek Canal, Carteret County, N. C. ; 15 miles northwest of Myrtle 

 Beach, Horry County, S. C; Waverly Mills, Georgetown, S. C; 

 and Cooper Eiver, Charleston County, S. C. More detailed collect- 

 ing has revealed this species to be present in considerable numbers 

 and well preserved in Cane Patch Bay on the Inter-Coastal Water- 

 way about 6 miles east of Myrtle Beach, Horry County, S. C. Here 

 in addition to adult specimens there occur the immature forms shown 

 on plate 65, figures 3, 5, and 6. These are not so abundant as the 

 adult specimens, but ones of 50 to 75 mm. are fairly common. 



Associated with this species is an allied form that is referable to 

 Encope michelhii L. Agassiz, which, so as far as I know, has not 

 previously been found fossil. Both this species and the Mellita are 

 rather abundant and easily distinguished from each other. The 

 heavy, rounded anterior margin and the posteriorally located apex 

 set it apart from its associated form. The immature forms are also 

 readily distinguished from the others, as the somewhat polygonal 



^Richards, H. G., Fauna of tbe Pleistoceiip Pamlico formation of the Soutliorn AtJnntie 

 Coastal Plain. Bull. Geol. Soc. Amer, vol. 47, pp. 1611-1G56, 19;:fi. 



443 



