1134 



NEW YORK STATE MUSEUM 



Distribution of the fauna from Frontenac island 



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Chaetetes (Monotrypella) arbusculus 



Favosites niagarensis? 



Halysites catenulatus 



Stromatopora concentrica 



Cyathophyllum hydraulicum 



Chonetes jerseyensis 



C. undulata 



Rhynchonella pisum 



Spirifer crispus var. corallinensis. . . . 



S. vanuxemi 



Stropheodonta bipartita 



S. textilis 



• S. varistriata 



Whitfieldella sulcata 



Ilionia sinuata 



Megambonia aviculoidea 



Pterinea subplana? 



Trochoceras gebhardi 



Pleurotomaria ? subdepressa 



Tentaculites gyracanthus 



Gomphoceras septoris 



Orthoceras trusitum 



Leperditia alta? 



L. c/. scalaris 



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The Cobleskill limestone appearing on Frontenac island also 

 outcrops at the south end of Howland's point, y± m ^ e northeast 

 of the island. The dip here is greater than on the island and the 

 outcrop less favorable for collecting. The surface layers how- 

 ever contain large white Favosites, making a strong contrast with 

 the dark color of the limestone. The surface as here exposed is 

 in places polished and grooved by glacial action, thus indicating 

 its resistant nature. A short distance from this outcrop on the 

 northwest end of Howland's point there is an outcrop of the 

 Salina waterlime carrying Eurypterus and an undescribed spe- 

 cies of Lingula. This outcrop of the Salina shows that the beds 

 of Cobleskill on Frontenac island immediately overlie the Euryp- 

 terus beds of the Salina. 



The Cobleskill limestone is also exposed in O'Connor's old 

 quarry iy 2 miles northeast of the island. The section in this 



