

ALBANY COUNTY 



17. 



Modiomorpliu suhalata 



rr 



18. 



Elymella Icvnta 



IT 



19. 



Ci/pricardella tenuistriata 



IT 



20. 



Actinopteria hoydi 



c 



21. 



Liopteria dckayi 



c 



22. 



PterUiopecten vertumnus 



c 



23; 



Homalonotus dekayi 



rr 



24. 



Tceniopora exigua 



c 



25. 



Lingula sp. 



rr 



26. 



Nucicla corhuliformis 



rr 



433 



From these lists it appears that either the Sherburne horizon is here in 

 part represented by the continental sediments of the Oneonta type or else 

 it carries a typical Hamilton fauna. I am inclined to regard the latter as 

 the true interpretation, since this section is as far removed from the 

 center of deposition of the Oneonta sands and muds as is that of 

 Moheganter Hill, where the Sherburne is still fully represented. 



Southeastern Xew York 



In tlie Port Jervis region, near the Xew York, Pennsylvania, Xew 

 Jersey boundary, the Sherburne beds contain a typical residual Hamilton 

 fauna. A short distance above sandy beds which carry an abundant and 

 typical Hamilton fauna Prosser found ledges of "thin flaggy stones which 

 split into layers between one-half and one inch in thicloiess. The stone 

 is very arenaceous, of slightly greenish tint, and may be called a sand- 

 stone with very thin layers.'^ It contains the following fauna :-^ 



1. Spirifer mucronatus aa 



2. Tropidoleptus carinatus a 



3. Ckonetes mucronatus rr 



4. C. setiperus rr 



5. Cyrtina hamiltonensis rr 



6. Cypricardella gregarius c 



7. Paracyclas lirata rr 



8. Modiomorpha suhalata rr 



9. Actinopteria hoydi rr 



10. PalAConeilo constrict a rr ^ 



Summaries of Faunas 



An analysis of the faunal lists given in the preceding pages and ob- 

 tained from the fossiliferous beds of the Sherburne east of the Unadilla 

 River shows that it is still a true Hamilton fauna, albeit a selected fauna. 



22 C. S. Prosser : Am. Jour. Sci., 3d ser., vol. 46, p. 212. Bull. U. S. Geol. Surv., no 

 120, p. 308. 



