394 G. II. Girty — Fauna found in the Devonian 



Description of Figures. 



Figs. 1-3. Plethospira socialis n. sp. 



1. Side view of an average specimen showing limited banded and ornamented 

 area. 



l a . Same seen from above. 



2. Another specimen of the same species. 

 2 a . Side view of the same. 



3. Superior view of another specimen. 



3 a . Inferior view of the same showing the umbilicus apparently nearly closed. 



3 b . Side view of the same. 



Devonian black shale (Genesee period ?) near Jeffersonville, Montgomery Co., 

 Kentucky. 



Fig. 4. Prioniodus armatus Hinde. 



The only specimen observed, x 18. 



Devonian black shale (Genesee period?) near Indian Fields, Clark Co., Ken- 

 tucky. 



Fig. 5. Leiorhynchus quadricostatum Vanuxem. 



Devonian black shale (Genesee period ?) near Jeffersonville, Montgomery Co., 

 Kentucky. 



Fig. 6 Lingula (Lingulipora) Williamsana n. sp. 



6. A rather large ventral valve, probably rendered somewhat too acuminate by 

 distortion. 



6 a . Ventral? valve. 



6 b . Ventral? valve. 



6 C . Dorsal valve. 



Devonian black shale (Genesee period ?) near Jeffersonville, Montgomery Co., 

 Kentucky. 



