68 



Report of the State Geologist. 



Spirifer, small species with sharp median septum, cf. mesacostalis, var. (cc). 

 Atrypa reticularis (c). 



Leptostrophia mucronata, the small variety occurring in Cortland county, 

 more abundantly at Ithaca and in the Seneca lake section. 

 Paracyclas lirata, common in the lower layers. 

 Grammysia arcuata. 

 Palceomilo emarginata. 

 P. fecunda (c). 

 Goniophora Hamiltonensis. 

 Modiomorpha concentrica (c). 

 Actinopteria perstrialis (c). 

 Pleurotomaria Itys. 



Platyceras, small sp. resembling P. syminetricum. 

 Cladochonus. 



Poteriocrinus gregarius (c). 



Stictopora Gilberti (cc). * 



Station V. One-half mile northwest of South Otselic, a ravine known as 

 Madison's gulf, on the west side of the Otselic river. Elevation of the 

 lowest exposure, thirty feet above the hotel. Dip section showing a high 

 angle, estimated at seventy-five feet per mile. Probable difference in eleva- 

 tion, fifty or sixty feet below lowest strata at Station III. 



The exposure here which was followed for a thickness of forty feet, con- 

 sists of unfossiliferous flags and sandy slabs, characterized by ripple marks, 

 worm and crustacean tracks, fucoidal casts, etc., distinguishing the lower 

 Portage (Sherburne) beds. 



Station. VI. Deliuyter ; on the south road entering the west end of the 

 village from the town of Lincklaen, and one-quarter of a mile south of the 

 cemetery, in a creek running along the road-side, the Tully limestone is 

 exposed.* Below it the Hamilton shales are shown at the cemetery and in a 

 fifteen foot bluff a little further south. The Tully limestone is very impure 

 and schistose below for a thickness of three feet, becoming more compact 

 above. Top not clear and the Genesee shales not exposed. Directly up the 

 hill from the Tully exposure, at an elevation of 225 feet, a quarry has been 

 opened on the land of David Wilcox. This section is in the upper part of 

 the lower and barren Sherburne sands, and the rocks bear the characteristic 

 fucoidal and wave marks. A thin, yellowish, compact quartz sandstone bears 

 Paracyolas Urata sparingly. The immediately overlying layers are softer 



• It is also seen two miles east of DeRuyter on the Georgetown road, and on:-half mile south of the Otselic stage road. 



