Peossee— -Hamilton and Chemung Seeies. 



HI 



township as well as those of Oxford and Greene to the south. A few localities 

 were studied by the writer that are not mentioned by Clarke, and a brief 

 description of them may add something to our knowledge of the geology of 

 the township. 



About one-quarter of a mile north of the Delaware, Lackawanna and 

 Western railroad station in Norwich village, is a railroad cut through bluish 

 shales and shaly sandstones. The base of the cut is not more than ten or 

 fifteen feet higher than the railroad station, which is given, as 1,001 feet A. T. 1 

 Fully five feet of rocks in which fossils are common, are exposed in the cut, 

 some of the layers containing large numbers of Liorhynch//* mew/costalis, 

 Hall; Ghonetes setigera, Hall, and Spi/rifer nmcronatus (Con.), Bill. The 



following species were collected : 



1. IAorTvyncJms mesacostaUs, Hall. (aa) 



2. Ohonetes s&itula, Hall. (a) 



3. Clionetes setigera, Hall. (aa) 



This narrower species with the smaller number of striae is by far 

 the most abundant specimen from the railroad cut. Some of the 

 specimens show a tendency towards O. lepida, Hall, in the character 

 of two stronger striae near the center of the shell and finer ones 

 between them. 



4. Spirifer mucranat/us (Con.), Bill. (aa) 



These specimens agree fairly well with figures of this species, as 

 figures 1, 4, 19. and 20 of plate 34 (Palaeontology of New York, Vol. 

 IV.), and are undoubtedly the same as the forms listed by Clarke 

 from Norwich as this species (Thirteenth Annual Report, p. 533, 

 etc.) ; but there are specimens from Ithaca that are difficult to 

 separate from some of these. There are both mucronate and 

 rounded forms. 



5. Spirifer granulosus (Con.), H. and C. (?). (rr) 



One impression which shows very clearly the numerous pitting* 

 produced by the pustules. 



6. Atrypa reticularis ( Linne), Dalm. ( rr) 



7. Tropidoleptus ca/rinatus (Con.), Hall. (c) 



8. ProdiLctetta, sp. (<•) 



Poorly preserved and broken specimens, possibly nearer 

 P. <l/t//iosa, H., than P. speciosa, H. 



1 The profile of the New York, Ontario and Western railroad gives the Norwich station a* 087 feet A T., ami it seems hardly 

 possible that there is a difference of fourteen feet between the two railroad stations in the village. 



