482 



Annals of the Carnegie Museum. 



6". viachcrei, 

 S. perelegans, 

 S. tabulata, 

 Syringopora sp., 

 Chonostegites clappi, 

 C. ordinatus, 

 Chonostegites 2 sps., 

 Michelinia convexa, 

 Cladopora cryptodens, 

 C. pulchra, 

 Striaiopora linficBana, 

 Pleii rodictyum styloporu m , 

 Halysites catenulatus, 

 A cervu laria da vidsoni, 

 Philipsastrcea verneuili, 

 Crepidophyllum coUigatum, 

 Acrophyllum oneidaense, 

 Bloth roph) 'I hi f?t decorticatum , 

 Cyathophyllum conatum, 

 C. 7'obustian, 

 Cystiphylliwi coTiifollis, 



Chonetes sp. , 

 Camarotoechia tethys, 

 D el thy r is raricosta, 

 Spirifer gregarius, 

 A try pa reticularis, 

 Atioplotheca acutiplicata 

 Dalmanella lenticularis, 

 D. testudinaria, 

 Plectambonites sericeus, 

 Callonema bellulata, 

 Platysioma lineattim, 

 Platyceras diivwsiim, 

 Teiitaculites scalarifonnis, 

 Calymmene platys, 

 Encrinurus sp. , 

 Acidaspis callicera, 

 Pro'etus sp., 

 Phacops cristata, 

 P. cristata var. pipa, 

 Phacops sp., 

 Cormilites sp. 



Of these fossils thirty-six species are found in the Onondaga, thir- 

 teen in the Hamilton, one in the Niagara, two in the Trenton, nine 

 in both the Onondaga and Hamilton, two in the Onondaga and Che- 

 mung, one in the Onondaga, Hamilton, and Chemung, one in the Oris- 

 kany, Onondaga, and Hamilton, and two are fossils which range all 

 through the upper part of the Paleozoic. 



The Source of the Drift. 



In the Second Geological Survey of Pennsylvania, 1881, Vol. Q4, p. 

 31, Dr. I. C. White states that the direction of glacial scratches on 

 thirty or forty hill- tops in Erie and Crawford counties is uniformly 

 about S. 30° E. College Hill, Meadville, is one of these hills. Ice 

 coming in the direction indicated by these scratches, would, in cross- 

 ing the province of Ontario, pass over strata of Hamilton, Onondaga, 

 Niagara, and Trenton age and this would account for the presence of 

 these fossils in the glacial drift of northwestern Pennsylvania. 



Of the corals listed above, ten species are reported from Ontario and 

 not from New York, while but two species are reported from New 



