May, 1909. New Echinoids — Slocom. 15 



The following list shows the echinoids and associated fossils 

 collected by the writer on the Patterson Farm, Pontotoc, Mississippi. 



ECHINOIDS 



Cassidulus subquadratus Conrad. 

 Cassidulus hemisphericus Slocom. 

 Hemiaster lacunosus Slocom. 



BRYOZOANS 



A few unidentified specimens. 



PELECYPODS 



Anomia argentaria Morton. 

 Cucullcea sp. 

 Exogyra costata Say. 

 Exogyra interrupta Conrad. 

 Gryphceostrcea vomer Morton 

 Ostrcea denticulifera Conrad. 

 Ostrcea tecticosta Gabb. 

 Ostrcea, two unidentified species. 

 Pecten sp. 



GASTROPODS 



Turritella tippana Conrad. 

 Several unidentified natural casts. 



CEPAHLOPODS 



Baculites. 



CRUSTACEA 



Thorax of a crab, unidentified. 



VERTEBRATES 



Shark teeth and vertebrae. 



The following were collected near One Mile Run and in the south- 

 ern part of the town of Pontotoc: 



ECHINOIDS 



Cassidulus intermedins Slocom. 

 Hemiaster parastatus Morton. 

 Hemiaster lacutwsus Slocom. 

 Linthia variabilis Slocom. 



