SILURIAN GBOUP. 



129 



Leptsena sarcinnlata, Hupaeh. 

 {chonetes, Fischer.) 

 sericea, Scm. 

 semiovalis, Mc'Coy. 

 tenuistriata. Sow. 

 transversalis. Balm, 

 {duplicata. Sow.) 

 Lingnk attennata. Sow. 

 brevis, Portl. 

 cornea. Sow. 

 lata. Sow. 

 Lewisii, Sow. 

 minima. Sow. 

 striata, Sow. 

 Orbicnla laevigata, Mujut. 

 oblongata, Portl. 

 permgata, Mc'Coy. 

 rugata. Sow. 

 striata. Sow. 

 subrotunda. Sow. 

 Orthis ActonisB, Sow. 

 alata. Sow. 

 ? applanata, Salter. 

 altemata. Sow. 



{compressa. Sow.) 

 anomala, Schlot. 

 antiqnata. Sow. 

 basalis. His. 

 bilobata. Sow. 

 callactis, Balm. 

 calligramma. Balm. 

 cancellata, Portl. 

 concentrica, Portl. 

 costata, Sow. 

 degantula, Balm. 

 expansa. Sow. 

 fallal, Salter. 

 filosa, Sow. 

 flabellulum, Sow. 



Orthis grandis, Sow. 



hybrida. Sow. 



imbrex, Bitch. 



intercostata, Portl. 



lata. Sow. 



lunata. Sow. 



orbicalaris. Sow. 



parva. Pander. 



pecten, Balm. 



protensa. Sow. 



radians, Sond. 



reversa, Salter. 



rustica, Sow. 



semicircularis, Sow. 



testudinaria. Balm. 



triangularis, Sow. 



vespertilio. Sow. 



virgata. Sow. 



Tmdnlata, Mc'Coy. 

 Pentamems galeatns, Balm. tp. 

 Knightii, Sow. 

 Isevis, Sow. 

 oblongus. Sow. 

 Spirifer biloba, Linn. sp. 



crispus. Sow. 



decemplicatns. Hall, 

 {pctoplicattu. Sow. Sil. 

 Syst. not Jlc'Coy.) 



interlineatus. Sow. 



laevis, Sow. 



liratns. Sow. 



ovatns. Me' Coy. 



pisnm, Sow. 



plicatns, Sow. 



ptychodes. Balm. 



radiatus. Sow. 



striatnlus, Schlot. sp. 



trapezoidaUs, Balm. 

 Terebratnla bidentata. His. 



