GEOLOGY OF THE FOURTH DISTRICT. 



ORGANIC REMAINS OF THE ORISKANY SANDSTONE. 



No. 29. — No. 59, page 148. 

 Fig. 1. Delthyris arcnosa, Conrad (Geol. Annual Report, 1839, p. 65). 

 Fig. 2. Atrxjpa elongata, Conrad (Annual Report, 1839, p. 65). 

 Fig. 3. Atrypa peculiaris, Conrad (Annual Report of 1841). 



No. 30. — No. GO, page 149. 

 Fig. 4. Atrypa unguiformis, Conrad. {Ilipparionyx proximus, Vanuxem, Geol. Report, p. 



124, fig. 4.) 

 Fig. 5. Cast of Delthyris arcnosa. 



The fossils of this rock are scarcely found in the Fourth District, except in loose scattered 

 masses which are common in Seneca county. The rock is abundantly fossili- 

 fcrous on the eastern shore of Cayuga lake. 



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