26 Bulletin 6 26 



Schizodus chemungensis, Chonetes lepida, C. scitula, Leda diversa, 

 Orthis impressa, Spirifer mesastrialis a, A5linopteria boydif , Rhyn- 

 chonella pugnus c, Crania sp.^ Strophodonta perplana var. nervosa, 

 Goniophora minor, Strophodonta ?micro7iata, A£linopteria sp. , Mi- 

 crodon bellistriatiis , Orthoceras bebryx var. caytcga, Aulopora sp., 

 Amboccelia icmbonata, Pterinea reproba, Palceoneilo plajia, ProduH.- 

 ella speciosa, Cyrtina hamiltonensis , Atrypa reticularis, Porcellia 

 naisf , fMesothyra sp. , Arthroacantha ithacensis. 



Spirifer mesastrialis and ProduHella speciosa are the predomi- 

 nant species at this station. Strophodonta perplana var. nervosa, 

 which is not a common species at most localities, is rather com- 

 mon in the upper part of the quarry. Rhynchonella piig^ius is 

 also quite common in the lower part of the quarry. 



Section VI, Buttermilk Creek. 



This sedlion includes about 250 feet of strata beginning in 

 the Ithaca shale at the base of Buttermilk falls. 



Station i. —Base of Buttermilk falls. 



A very interesting fauna occurs in the dark shale at the foot 

 of the falls. The following species have been recognized: Lin- 

 gula punctata a, L. spatulataf , Leiorhynchus mesacostalis a, Or- 

 this vanuxemi a, Palczoneilo constriSla, Coleolus sp. , Loxonema del- 

 phicola c, Pleurotomaria capillaria, Grammysia subarcuata c, Lep- 

 todesma sociale, Arnbocoelia umbonata, A£linopteria sp., Stiflopora 

 meeki, Prodnflella speciosa (sm. var. j, Rhyiichonella eximiaf , Nu- 

 ciila diffidens c, Orthoceras sp., Macrocheilus {^Holopea) macrosto- 

 musf , Phthonia cylindrica. 



The Ithaca shale fauna at this station contains three species 

 which have not before been recognized in the Ithaca group. 

 Two of these are referred with doubt, owing to the slightly flat- 

 tened condition of the specimens to Macrocheilus {Holopea) ma- 

 crostomus and Phthonia cylindrica,. both of which are Hamilton 

 species. The specimens referred to Orthis vanuxemi are identi- 

 cal with the Hamilton specimens of this species; they occur 

 abundantly through a few inches of strata. 



Station 2. — 60 feet above Station i. 



The following is a list of the species colle(5ted at this point: 

 Modiomorpha subalata var. chemimgensis, Nucula diffidens, Palceo- 

 neilo filosa a, P. constrifla, StiHopora meeki, Lzinulicarditim fragile , 

 Macrocheilus sp., Pletirotomaria capillaria, Schizodus sp., Modio- 



