72 Repokt of the State Geologist. 



Spirifer mesastrmlie and Spirifer mucronatus var. posterns. No other outcrop 

 occurs on this creek in this township. 



IX 1 . Brook one mile east of MeGrawville on the farm of Joel Pritchard, 

 crossing the kSolon road. Elevation, seventy-five feet above Station IX. The 

 section here covers a thickness of about 100 feet, the rocks at the base being 

 sottish, compact, arenaceous shales, with the following species of fossils: 



Spirifer mesastrialis (cc). 



A mbocodia umbonata. 



Liorhynchus mesacostalis. 



Spirifer mucronatus var. posterns. 



Gyrtin a Ham iltonensis. 



Cyrtina, large form with plicated sinus; cf. curvilineata. 



Atrypa reticularis (c). 



L(pfostrophia m ucrotiata. 



Productella spinulicosta. 



Rhyrichonella cf. eximia. 



Man ticoceras Patersoni. 



Paracyclas lirata. 



Bellerophon sp. no v. with large aperture, narrow whorls and tine concen- 

 tric surface ornament. 

 Cladochonus (c). 



Jfelocrinus tricyclus, Eaton (sp.) ; "tricircled encrinite," of Vanuxem(cc). 

 Immediately overlying are compact sandstones with 



Spirifer Icevis. 

 Jfelocrinus tricyclus. 



With the exception of the occurrence on Cowles hill, Greene (see 

 page 37), this is the easternmost appearance of the species, Spirifer her is. 

 It has, however, been recorded from Halt's quarry, near East Homer, which 

 is almost on the same meridian and about live miles to the north. 



From this point upward the rocks are much less fossiliferous, evidences 

 of the "tricircled encrinite" occurring frequently, and the section is termi- 

 nated by a thin sandstone bearing masses of Stictopora Gilherti. Loose blocks 

 in the stream indicate the not remote presence of Tropidohptus carvnatus 

 associated w ith Spirifer mesastrialis. 



Station A'. Preble, Cortland county. This village lies in the valley plain, 

 just north of the junction of the west branch of the Tioughnioga river with a 

 Stream coming in from the w est through the tow n of Scott. An exposure was 

 observed along a creek just off the first road running northwest beyond 



