12 NEW YORK STATE MUSEUM 



Camarotoechia sappho Hall 

 C. horsfordi Hall 

 Chonetes scitulus Hall 

 C. mucronatus Hall 

 Strophalosia truncata Hall 

 Ambocoelia umbonata {Conrad) 

 Orthothetes arctostriatus Hall 

 Spirifer subumbona Hall 

 S. audaculus {Conrad) 

 Atrypa recticularis Linne 

 Panenka lincklaeni Hall 

 P. aequilatera Hall 

 Pterinopecten exfoliatus Hall 

 Actinopteria muricata Hall 

 Aviculopecten bellus Conrad 

 Styliolina fissurella Hall 



CARDIFF SHALE 



The shales succeeding the Stafford limestone and formerly known 

 as upper Marcellus, are richly bituminous, though in a somewhat 

 less degree than those below, for about sixty feet gradually becom- 

 ing more argillaceous and lighter colored, and passing into the 

 next higher formation. 



The only exposure of the Cardiff shale on this quadrangle is along 

 Little Conesus creek between the Erie Railroad bridge and the Avon 

 reservoir. In the Livonia shaft section these beds were penetrated 

 at 753 to 823 feet and the following species were found in them : 



Tornoceras uniangulare {Conrad) 

 Orthoceras subulatum Hall 

 O. nuntium Hall 

 Cyrtoceras sp. 



Pleurotomaria rugulata Hall 

 P. capillaria {Conrad) 

 Bellerophon leda Hall 

 Liopteria laevis Hall 

 Modiella pygmaea {Conrad) 

 Pterochaenia fragilis {Hall) 

 Actinopteria muricata Hall 

 Buchiola retrostriata v. Buck 

 Actinopteria (small) sp: 

 Panenka lincklaeni Hall 



