1134 



NEW YORK STATE MUSEUM 

 Distribution of the fauna from Frontenac island 



Chaetetes (Monotrypella) arbusculus. 



Favosites niagarensis? 



Halysites catenulatus 



Stromatopora concentrica 



Cyathophyllum hydraulicum 



Chouetes 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 sept oris 



Orthoceras trusitum 



Leperditia alta? 



L. cf. scalaris 



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The Cobleskill limestone appearing on Frontenac island also 

 outcrops at the south end of Howland's point, 14 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 1\' 2 miles northeast of the island. The section in this 



