2G 



S. Goniatitcs complanatus. A Cephalopod. Commoner in 

 Portage above. Found at very base of Genesee shale 

 from Cayuga lake to Lake Erie. 



9. Fragment of a stem of a plant, common in uppermost Gen- 

 esee ledges. 



(Portage Pelecypoda ) 



10. Cardiola (species?). Lower Portage sandstone horizon, 



westward. 

 1 r . Cardiola retrostriata. 4 ' 4 ' " 4 4 



westward. 



12. Palaoneilo filosa. Middle Portage, eastward. Eastern 



Chemung. 



13. Palceoneilo constncta. East and west Portage and east 



Chemung. 



14. Nucula corbuliformis, probably. East Portage and east 



Chemung. 



15. Modiomorpha subalata var. chaining ensis. Portage, east- 



ward. 



16. Leptodesma sociale. Middle Portage shale; western Che- 



mung. 



17. Limulicardium fragile. Genesee and middle Portage beds. 

 iS. Actinopteria boydi. Middle Portage and eastern Chemung. 



19. Gonicpkora cf. minor. Middle Portage, eastward. 



20. Microdon bellistriatus. Middle Portage, eastward and east 



Chemung. 



21. Grammy sia subarcuata.* i( 

 2 2 . Gra m mysia elliptica . ' ' 



23. Schizodus chemungensis. Middle Portage, eastward and 



eastern Chemung. See also PI. X, fig. 77. 



24. Mytilarca chemungensis, variety. Middle Portage, east- 



ward and east and west Chemung. See also PL X, 

 %• 73. 



25. Spathella typica. Middle east Portage and east Chemung. 



Note. The figures shown on this and other plates are usually from one- 

 half to two-thirds life size. 



( ( a 



