- A') 



rii) 



Ost 



rœa 



Spondylus 



Pecteii 



Arca 



Trigona 



Cardium 



Hippurites 



Gypliosoma 

 Holcclypus 

 Hemiaster 



Aespidiscus 



dichotoiiia, Bayle. — El-OuUiïn, Tebessa, 



Oued-el-Kantra. 



Syphax, Coquand. — Tebessa, Aïu-Zairin. 



elegansj Bayle. — El-Kantra, El-Outaia , 



Tel)es?a. 



hiauriculata, Lanik. — Oued-el-Kanlra. 

 Jlabcllata — Tebessa, 



ietragonaj Bayle. — Mezâb cl-Messaï. 



hystrix i Goldf. — El-Outaïa. 



tncostatus, Bayle. — Id. 



Ligeiiensis, d'Orb. — Id. 



scabra, Lamk. — Mezâb -el-Messaï. 



sulcifemm, Bayle. — El-Outaïa. 



organisans, Desm. — Oued-Clieniour. 



cormi-pastorisj, Desm. — Aïn-Zairin. 



Delainarcif Desliayes. — Betna. 



serialis, Deshayes. — Mezâb- el-Messaï, 



Fourneli, Deshayes. — Mezâb-el-Messaï , 

 El-Outaïa, Tebessa, 

 Auress, Aïn-Zairin. 



vristatus, Edw. et Maime. — Auress. 



6° Craie blanche, 



Ostrœa Idtvûj Lamark. — Tebessa. 



— coniu-arietis, Goldt. — Auress. 



— JlatherojiiciJia, dOrb. — Djebel-Abiod, 



El-Outaïa. 



— K>esicnlaris, Lamk. — El-Outaïa , Djebel- 



x\biod, El-Kantra, Mezâb-el-Messaï. 



Pectcn cjuadricostatasj d'Orb. — Cbepka, Auress. 



