Handbook of Paleontology 339 



eral very rare and in a fragmentary condition. Most of 

 the fossils were obtained in the dark gray to black shale 

 bands and the dolomitic slabs, but they also occur in the 

 green shale. In certain layers the brachiopod Camarotoe- 

 chia lit ch field 'ensis is quite abundant; also the ostracod 

 Leperditia scalaris, the crustacean Ceratiocaris salina 

 and Eurypterus pittsfordensis are locally common. The 

 species that are considered particularly characteristic are 

 the cephalopod Hexameroceras chadwicki, the crustacean 

 Ceratiocaris salina and the eurypterids Hughmilleria 

 phelpsae and Pterygotus vernonensis. 



The Camillus shale (Clarke '03) was named from Ca- 

 millus in Onondaga county and includes, besides the 

 shales, abundant gypsum and salt beds and flaggy dolo- 

 mites. The salt-bearing strata are designated by the 

 term Syracuse salt (Clarke '03), which includes the main 

 salt layers and the salty shale and limestone associated 

 with them. No sharp boundary exists between the salt- 

 bearing strata and the rest of the Camillus, and it can 

 only be determined from well records and shafts which 

 reach the salt at a depth of 800 feet and more. In 

 Wyoming and Livingston county salt beds occur with 

 an aggregate thickness of 50 to 100 feet, and there are 

 some beds of pure salt 40 to 80 feet thick. The Camillus 

 shale is gray, drab, red or variegated and the dolomite is 

 gray or drab. The total thickness of the whole series, 

 including the gypsum and rock salt, is 450 to 500 feet in 

 the central part of the belt in Onondaga and Cayuga 

 counties and here the gypsum beds have a maximum 

 thickness of 50 to 60 feet. Workable gypsum occurs at 

 various levels below the Bertie waterlime. In the west- 

 ern area the high grade gypsum occurs 75 to 125 feet 



