88 THE EOCEXE DEPOSITS OF MARTLAXD 



Tornatellaea bella Conrad. Corbula sicbengonata Dall. 



VolntiUthes petrosus (Conrad). Corbula aldricM Meyer. 



Levifusus traheatus Conrad. Jferetrix ovata (Conrad.) 



Cypraea sniithi Aldricli. Pecteu johnxoni Clark. 



Calyptraphorus trinodiferus Conrad. Glycymeris idoneus (Conrad\ 



Lunatia marylandica Conrad. Cucullaea gigmitea Conrad. 



Calyptraea aperta (Solander). Leda parva (Rogers). 

 Cadulus abruptus Meyer and Aldrich. 



The ISTanjemoy stage contains the following species found in the Uj)per 

 Chickasawan of the Gnlf. They are: 



Tornatellaea bella Conrad. 21eretrix sitbimpressa Conrad. 



Tolutilithes petrosus (Conrad). Liccina astartiformis Aldrich. 



Fusus interstriatus Heilprin. Lucina uhleri Clark. 



Levifusus trabeatns Conrad. Modiolus alabamensis Aldrich. 



Cypraea sniithi Aldrich. Fecten choctavensis Aldrich. 



Calyptraphorus trinodiferus Conrad. (?) JPecten johnsoni Clark. 



Lunatia marylandica Conrad. (.?) Ostrea sellaeformis Conrad. 



Calyptraea aperta (Solander). Pteria limula (Conrad). 



Cadulus abruptus Meyer and .Vldrich. Glycymeris idoneus (Conrad). 



{?) Corbula siibengmiata Dall. Trigonoarca decisa (Conrad). 



Corbula. aldrichi Meyer. Leda parva (Rogers). 



Jleretrix ovata Conrad. Leda potomacensis Clark and Martin. 



Among these species a few only are restricted to the Upper Chick- 

 asawan. They are: 



Fusus interstriatus Heilprin. Jlodiolus alabamensis Aldrich. 



Jferetrix subirnpressa Conrad. Pecten choctavensis Aldrich. 



Lucina astartiformis Aldrich. Leda potomacensis Clark and Martin. 

 Lucina uhleri Clark. 



Of these forms 2Ieretrix subirnpressa, Lucina astartiformis and Leda 

 potor)iacensis are foimd only in the Xanjemoy stage. 



The following species of the Xanjemoy stage are found in the Lower 

 Claibornian: 



Vol utilithes petrosus (Conrad). {?) Corbula s^bengonata Dall. 



Levifusus trabeatus Conrad. Corbula aldrichi Meyer. 



Pyrula penita I'ar Conrad. Corbula oniscus Conrad. 



Mesalia obruta (Conrad). Ostrea sellaeformis Conrad. 



Lunatia marylandica Conrad. Pteria limula (Conrad). 



Calyptraea aperta (Solander). (?) Glycymeris idoneus (Conrad). 



Cadulus abruptus Meyer and Aldrich. Trigonoarca decisa (Conrad). 



Among these forms Mesalia obruta is the only species that is confined 

 to the Lower Claibornian, while three others do not pass the limits of 

 the Claibornian stage, viz., Pyrula penita var., Corhula oniscus and (?) 

 Ostrea sellaeformis. 



