Peossee — Hamilton and Chemung Seeies. 



121 



25. Modiomorpha mytokndes (Con.), Hall. 



(rr) 



26. Modiomorpha cono&ntrica (Con.), Hall. 



(rr) 



27. Phacops rana (Green), Hall. 



(it) 



28. Trilobite, sp. (fragment). 



(rr) 



29. Orthoceras, sp. (fragment). 



( H ) 



OU. J. 1 ill '/< 11 ((•> \ l< )<) Hill >cl let I It) ItlellLlly spec lilt all y ). 



V T ) 



31. Bellerophon, sp. (two very imperfect specimens). 



(rr) 



XVIII A s . On Pleasant brook just above the upper 



highway bridge, 



five and one-half miles above Smyrna village, on the Gilbert Tuttle farm, is 

 an exposure of shales and limestone. Below the limestone are one and one- 

 half feet of black, argillaceous shales that are quite fossiliferous, containing 

 numerous specimens of typical Spirifer mucronatus (Con.), Bill., Vitulina 

 pustulosa, Hall, and other Hamilton fossils. This outcrop is some 275 feet 

 by the barometer above the New York, Ontario and Western railroad 

 station in Smyrna, or approximately 1,400 feet A. T., and is at the top of the 

 Hamilton formation. The following species were collected: 



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



2. Vitulina pustulosa, Hall. (a) 



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



4. Chonetes, sp., probably C. setigera, Hall. (rr) 



5. Modiella pygmaza (Con.), Hall. (rr) 



6. Nuculites oblongatus (Con.). (rr) 



7. OHhonota undulata (Con.). (rr) 



8. Palworieilo emarginata (Con.), Hall. (rr) 



9. Dalmanites BootJii (Green), Hall. (r) 

 10. Bellerophon, sp. (rr) 



11. Internal impression of a large Ortlwceras from a loose slab of sand- 

 stone in the creek. 



XV III A 6 . On top of the shales are three and a half feet of somewhat 

 impure limestone, separating into two or three layers, the upper being the 

 purer. Above the limestone, part of which is dark in color and strongly 

 calcareous, with the lithologic characters of the Tully, the rocks are covered 

 by soil. A little farther up the brook is another outcrop of rather impure 

 limestone five feet in thickness, which is apparently higher than the former. 

 It seems probable that there are fully ten feet of the impure limestone at 

 this locality, and the actual thickness is no doubt somewhat greater, but is 

 obscured by the soil. 1 So far no fossils have been found in this limestone 



1 Professor S. G. Williams, in describing this locality, stated the indications were that " the limestone is at least fifteen feet 

 thick." (Sixth Annua! Report State Geologist [New York], p. 18). 



