Peosser — Hamilton and Chemung Series. 



199 



In all this region between the Unadilla and Susquehanna rivers, the hills 

 are so mantled with the drift that it is frequently puzzling to determine 

 precisely where to draw the line of separation between different formations. 

 The streams in general afford the most satisfactory sections, although out- 

 cropping ledges on the sides of the steep hills sometimes furnish valuable 

 assistance. 



Milford. 



The township of Milford lies south of Hartwick and east of Laurens and 

 Oneonta. The Susquehanna river flows through the eastern part of the 

 township, to the east of which is a high and steep hill, while on the western 

 side the hill rises much more gradually and is broken by a number of small 

 valleys. 



XXV B x . In the northern part of the township is the village of Mil- 

 ford, and nearly one mile north of the village is a gorge along a small brook. 

 At the old mill the channel of the brook is narrow, with rock walls which 

 afford an excellent idea of the nature of the rather thin shales of the upper 

 Hamilton. The blue shales with which some thin sandstones alternate, 

 contain abundant specimens of Spirifer mucronatus (Con.), Bill., and the 



complete list is : 



1. Spirifer mucronatus (Con.), Bill. (a) 



2. Chonetes lepida, Hall. (rr) 



3. Tropidoleptus earinMus (Con.), Hall. (rr) 



4. Palceoneilo fectmda, Hall. (rr) 



XXV i? 2 . At the upper end of the short gorge, just below the highway 

 bridge, are bluish argillaceous shales in which Hamilton fossils are abundant. 

 The locality is about thirty feet above B 1 and perhaps 130 feet above the 

 hotel in Milford. This is a good locality for collecting, and> the following 



species were obtained in a short time: 





1. 



Spi/rifer rmtcronatus (Con.), Bill. 



(aa) 





Chonetes setigera, Hall. 



(aa) 



3. 



Chonetes lepida, Hall. 



(«) 



4. 



Tropidoleptus carinatus (Con.), Hall. 



% 



5. 



( 'Jionetes scitula, Hall. 



(it) 



6. 



Orbiouloidea, sp. 



(rr) 



i . 



Niiculites triqueter, Con. 



(rr) 



•s. 



Schizodus appressus (Con.), Hall. 





9. 



Palceoneilo constricta (Con.), Hall. 



(IT) 



