Prosser — Hamiltgn a\d Chemung Series. 



XXIV C 4 . Near the summit of Bowie hill, some 715 feet above Otego 

 creek, about one-half mile southwest of Arnold lake, is an outcrop of rather 

 coarse-grained, bluish to dark grey sandstone, containing numerous specimens 

 of Spirifer mesastriaUs, Hall. There are shaly partings with iron concretions, 

 and these shales are more fossiliferons than the massive sandstones, for they 

 contain numerous specimens of Spirifer miwronatus (Con.), Bill.; Tropidolep- 

 tus cwinatus (Con.), Hall; Ghonetes setigera i Hall; RhyTwTionella Steven si, 

 Hall, and LiorhyTichus mesacostaMs, Hall. Loose pieces of bluish, arenaceous 

 shales scattered over the top of the hill contain specimens of liorhynchm 

 mesacostaUs, Hall, and fucoidal markings. The rocks in place near the sum- 

 mit of Bowie hill clearly belong in the lower part of the Ithaca formation. 

 The complete fauna is : 



1. 



Spirifer mesastriaUs, Hall. 



(c) 



2. 



Spirifer rrmcronatus (Con.), Bill. 



(a) 



3. 



TropiJoleptus carinatus (Con.), Hall. 



(a) 



4. 



IAorhyTwhus mesdeostalis, Hall. 



(c) 



5. 



Oyrtina Haniiltonensis, Hall. 



(D 



6. 



Chonetes set i (/era, Hall. 



(r) 



7. 



Rhynchonella (Camarotcechia) Stevensi, Hall. 



(a) 



Some of the smaller specimens more closely resemble R. eximia. 

 Hall; but it is probable that the two forms blend into one species. 



8. Atrypa reticularis (Linne), Dal. (it) 



9. Actinqpteria Boijrfi (Con.), Hall. (c) 

 10. C-rramnnjsia hisnlcata (Con.), Hall (?). (it) 



SECTION OF MT. VISION A XI) BOWIE HILL. 



715' 





C 4 . Ithara. Spirifer mesastriaUs. 





115' 



Covered. 



000' 







C 3 . Sherburne (?). 





250' 



Covered. 



350' 





C 2 . Hamilton. 





250' 





100' 





C 1 . Hamilton. 





100' 



Covered. 



0' 





Otego creek level at Mt. Vision. 



