23 Ithaca Group 23 



r, Lhigula complariata r, PalcBoneilo plmia. 



Station 2. — The quarry in the cemetery lies about 25 feet 

 above the last. PluTuulina plumaria occurs here rather abund- 

 antly. Some of the species associated with it are Pleurotomaria 

 capillaria, Rhynchonella eximia^ Spirifer mesacostalis, S. mesastri- 

 alis, Aflinopteria sp. 



Station j. — University quarry is about 235 feet above the 

 Spirifer Icevis zone in Fall creek. The Spirifer mesastrialis fauna 

 reaches its best development here. The species identified from 

 this quarry are as follows: Spirifer mesastrialis a.,S. mesacostalis c, 

 Rhynchonella eximia c, Cryptonella endora a, Bellerophon sp?, 

 Spathella typicaf, Platysto^na lineattim var. callosum r, Pleurotoma- 

 ria capillaria r, Cyrtiiia hamiltonensis c, PterinopeSlen ereftus r, 

 StiHopora meeki c, Gomphoceras tujnidum. r, Ailinopteria boydi, 

 Orthoceras bebryx var. cayuga, Leptodesma socialef. 



Section IV, Williams Creek. 



This secftion affords a good continuous exposure of the rocks 

 from the upper Spirifer IcEvis zone of the Portage well up into 

 the Ithaca group. 



Station i. —At the southwest corner of the lake, about 6 feet 

 above its level, the upper Portage Spirifer Icevis fauna occurs. 

 The following species were found: Spirifer Icevis, Aulopora sp., 

 Paltzoiieilo flosa, Orthoceras sp. , Crania sp., Cyrtina hamiltonensis. 



Station 2. — At the old quarry near the railroad, about ^ mile 

 south of Williams creek, the following species were obtained 

 about 15 feet above the level of the lake: Goniatites discoideus, 

 Pal(zoneilo filosa, Orthoceras ^-^.^ Chonetes lepida? , Leptodesma sp. , 

 PalcEoneilo constriHa, Aulopora sp. 



Stations j & ,^. — These two stations occur in the Ithaca shale 

 about 60 feet above the lake. The following species were 

 found: Lunulicarditim fragile c, Produriella speciosa a, Li?ig7ila 

 complanata a, Leptodesma sociale, Orthoceras pecator. 



Station 5. — This station is 265 feet above the lake in a bed 

 of impure limestone about 5 feet in thickness. Nearly all of 

 the following list of species are from this limestone, but a few are 

 from the shale immediatel}^ beneath: A try pa retic7ilaris a, A. 

 spinosa c, Spirifer mesacostalis, S. mesastrialis c, Cyrtina ha7nilton- 

 ensis c, Cryptonella eudora c, Leiorhynchus mesacostalis, StiHopora 



