128 



SILURIAN SYSTEM. 



Modiola expansa, Portl. 

 Nerei, 3Iunst. 

 securiformis, Portl. 

 Mytilus cinctus, Portl. 



semirugatus, Portl. 

 Nucula Isevis, Sow. 



cingulata. His. 



ovalis, Sow. 



grandseva, Goldf. 



radiata, Portl. 



Protei, Munst. 



subacuta, Mc'Coy. 



Nucula subcylindriea, Mc'Coy. 

 Pectunculus ambiguus, Portl. 

 Apjotni, Portl. 

 semitruncatus, Portl. 

 Psammobia rigida. Sow. 

 Pleurorhynchus pristis, Salter. 

 Pullastra complanata, Sow. 

 speciosa, MdCoy. 

 Isevis, Sow. 

 Sangninolaria compressa, Goldf. 

 obovata, Munst. 



MONOMYAEIA. 



Avicula antiqua, Goldf. 

 bullata, Mc'Coy. 

 lineata, Soio. 

 Neptuni, Goldf. 

 obliqua, Sow. 

 orbicularis. Sow. 

 planulata, Conrad, sp. 

 rectangularis, Sow. 

 reticularis, His. 

 retroflexa, Sow. 



Inoceramus contortus, Portl. 

 priscus, Portl. 

 transversus, Portl. 

 trigonus, Portl. 

 Posidonomya venusta, Munst. 

 Pteriuea lamellosa, Goldf. 

 lineata, Goldf. 

 ventricosa, Goldf. 

 fimbriata, Mc'Coy. 

 orbicularis, Mc'Coy. 



Brachiopoda. 



Atrypa compressa, Sow. 

 crassa. Sow. 

 depressa. Sow. 

 didyma, His. 

 globosa. Sow. 

 hemisphserica. Sow, 

 lens. Sow. 

 linguifera. Sow. 

 obovata. Sow. 

 orbicularis. Sow. 

 plana. Sow. 

 rotunda, Sow. 



Atrypa teuuistriata. Sow. 



transversa, Portl. 



undata. Sow. 



Leptsena depressa. Balm. 



{rugosa, Dalm.) 



euglypha. Balm. 



{complanata. Sow,) 

 imbrex. Pander. 

 laevigata, Sow. 

 Isevissima, MdCoy. 

 minima, Sow. 

 plicotis, Mc'Coy. 



