correlating Geological Formations. 429 



The faunule from Owego, to which I made reference in my 

 papers of 1884 and 1886, was so characteristically Hamiltonian 

 in its species that at that time it was difficult to believe that the 

 zone in which it occurred was not out of place. But the recent 

 rediscovery of the zone at Waverly by Dr. Kindle, and a 

 comparison of the forms, leaves no doubt as to the actual 

 position of the recurrent Hamilton faunule in the midst of 

 the Chemung formation. The species of this faunule are 

 given in the following list. 



. Recurrent Tropidoleptus fauna from Cemetery Hill, 

 Owego, Tioga Co., on side hill above, and southeast of 

 the old Erie depot, collected by H. S. Williams (U. S. G. S. 

 station 1130 A). 



1. 



Spirifer marcyi var. 



aa 



Hamilton 



2. 



Ambocoelia umbonata 



a a 



Marcellus-Chemung 



3. 



Cypricardella bellistriata 



a a 



Hamilton 



4. 



Tropidoleptus carinatus 



c 



Hamilton 



5. 



Leiopteria bigsbyi 



c 



Hamilton 



6. 



Phacops rana 



r 



Hamilton 



7. 



Productella speciosa 



r 



Portage-Chemung-Kinderhook 



8. 



Coleolus acicula 



r 



Genesee 



9. 



Loxonema delphicola 



r 



Hamilton 



10. 



Camarotceehia cf. p)rolifica 



r 



Marcellus-Hamilton 



11. 



Gonio%)horahamiltonensis 



r 



Hamilton 



12. 



Mo dio n i orpli a my t ilo ides 



r 



Hamilton 



13. 



Spirifer cf. granulosus 



rr 



Hamilton 



14. 



Chonetes setigera . 



rr 



Marcellus-Waverly 



15. 



C. lepida 



rr 



Marcellus-Chemung 



16. 



Macrodon Hamilton ice 



rr 



Hamilton 



17. 



JLingula sp. 



rr 







18. 



Pterinea sp. 



rr 







19. 



Grammy 'sia sp. 



rr 



. . _ , 



20. 



Palceoneilo sp. 



rr 







21. 



Aviculopecten sp. 



rr 





It will be observed that of the sixteen species, specifically 

 identified, all but two are Hamilton species. One of the 

 exceptions is Productella speciosa, which has been reported 

 from Portage, Chemung and Kinderhook formations, and the 

 other, Coleolus acicula, is a Genesee species. Eleven of the 

 sixteen have not been hitherto reported from above the 

 Hamilton formation ; while the other four range both below 

 and above that formation. 



On the principle of specific identification, therefore, this 

 faunule belongs to the genuine Tropidoleptus carinatus fauna, 

 of which it contains four of the dominant species of the 

 standard list. 



