Prossek — Hamilton and Chemung Series. 



L05 



3. Chonetes coronata (Con.), Hall. (r) 



4. Chonetes setigera, Hall. (cc) 



5. Chonetes rnucronata, Hall (?). (r) 



6. Spii'ifer mucronatus (Con.), Bill. (c) 



7. Spirifer audaculus (Con.), Hall and Clarke. (it) 



8. Spipifer fvnibriatus (Con.), Bill. (it) 



9. Orthis (?). (rr) 



10. Discitia. (rr) 



11. Nucula belUstriata (Con.), Hall. (r) 



12. Nucula corbuliformis, Hall. (rr) 



13. Nucula lirata (Con.), Hall. (r) 



14. Palceoneilo constricta (Con.), Hall. (rr) 



15. Microdoii (Cypricardella) bellistriatus, Con. (r) 



16. PhoUtdella radiata (Con.), Hall. (rr) 



17. Orthonota (J) parvula, Hall. (rr) 



18. ('.) Modiella pygmcea (Con.), Hall. (rr) 



19. (?) PhtJwnia sectifrons (Con.), Hall, fragments, (rr) 



20. Tellinopsis subemarginata (Con.), Hall. (r) 



21. Sehizodus \ appressus (Con.), Hall. (rr) 



22. Orthoceras, fragment. 

 28. Betterophon, fragment, 



XVIII A. 1 . Along Pleasant brook, above the highway bridge in Smyrna 

 village, is a rather narrow gorge with rocky banks thirty feet or more in 

 height, extending for a quarter of a mile up the brook. The rocks consist of 

 coarse arenaceous shales, alternating with sandstones. All the layers are more 

 or less fossiliferous, and the shales contain abundant fossils. The bottom of 

 the gorge is about twenty-five feet above the level of the railroad station, or 

 with an approximate altitude of 1,150 feet A. T. On account of the consider- 

 able number of species contained in these rocks, some time was spent in 

 collecting, and the specimens found in the lower, middle and upper parts of 

 the glen were kept separate. The following lists will give a fair idea of the 

 species contained in thirty or forty feet of upper Hamilton rocks in the 

 Chenango valley region. From the lower part of the glen the following 



species were collected . 



1. Ambocadia umbomtta (Con.), Hall. (aa) 



2. Spirifer fnibriatns (Con.), Bill. (cc) 

 •\. Spirifer granulosus (Con.), Hall and Clarke. (a) 

 4. Spirifer audacuhis (Con.), Hall and Clarke. (c) 



