Pkosser — Hamilton and Chemung Series. 189 



3. Stropheodonta perplana (Con.), Hall. (it) 



4. Atrypa reticular is (Linne), Dal. (rr) 



5. Pakeoneilo emargmata (Con.), Hall. (it) 



XXIV 7> 2 . Somewhat below the above locality the rocks of the hillside 

 are w ell exposed along the gorge of Fall brook, which has rocky banks w ith 

 several cascades in the course of its steep descent. All the rocks along the 

 gorge are clearly Hamilton in age. In the upper part of the gorge above the 

 upper bridge are bluish, arenaceous shales. Those near the top are thinner, 

 and the layers more even, approaching thin sandstones in texture. The upper 

 shales of the brook are about 230 feet above the level of the Otego creek, at 

 Mt. Vision, one and three-quarter miles to the southeast. Fossils are com- 

 mon, and careful collecting would yield a fairly large number of species. The 

 following were obtained in a short time : 



1. Spirifer granulosus (Con.), Hall. (r) 



2. TerebraPula {Ewnella) LincMaeni, Hall, (rr) 



3. Amboccelia wmbonata (Con.), Hall. (r) 

 •4. Spirifer Tullius, Hall. (c) 



One of the noticeable features in the palaeontology of Otsego 

 county is the large number of specimens of the above species in 





the upper Hamilton. 





5. 



Spirifer fi)nl>riatus (Con.), Bill. 



(rr) 



6. 



Tropidoleptus carmatus (Con.), Hall. 



(rr) 



7. 



Stropkeodonta per pi ana (Con.), Hall (?). 



(rr) 



8. 



Chonetes seUgera, Hall. 



(rr) 



9. 



Nuoula bellistriata (Con.), Hall. 



(r) 



Id. 



Palceoneilo perplcma, Hall. 



(rr) 



11. 



Grammysia (Sphenornyd) cuneata, Hall. 



0) 



12. 



Pitacoj)* rana (Green), Hall. 



(IT) 



Under the upper bridge of Fall brook is a stratum containing numerous 

 specimens of Spirifer granulosus (Con.), Hall. 



XXIV I) 1 . At the foot of the gorge, only sixty-live feet above the 

 Otego creek, are bluish, rather coarse, arenaceous shales which contain plenty 



of fossils, especially Tropidoleptus carinatus (Con.), Hall. The list is as 

 follows : 



1. Tropidoleptus carinatus (Con.), Hall. (a) 



2. Spirifer mucronatus (Con.), Bill. (r) 



3. Spirifer granulosus (Con.), Hall. (rr) 



4. Microdot) (jOypricardeUd) tenuistriatus, Hall. (rr) 



