122 NEW YORK STATE MUSEUM 



Feet Inches 



above base of section and about 40 feet above 

 top of Onondaga. Here begins a series of lime- 

 stones separated by shale beds and recurring 

 with some differences in the character of the 

 contained fauna. At the base of this lowest 



limestone, which has here a thickness of 1 5 



occurs abundantly in a nodular layer the gonia- 

 tite Anarcestes plebeiformis Hall, 

 the only locality recorded for this interesting 

 species, associated with Loxonema m inus- 

 c u 1 a Hall, also known from no other locality. 

 Agoniatites ex pans us does not occur 

 in this layer, but is occasionally found in an 

 imperfect condition with the rare variety, 

 nodiferus (not elsewhere known) in the 



shale mass above which is 4 9 



Then follows another limestone with Agoniatites 



and a few other fossils , 8 



Barren fissile shale 4 



Limestone, top of falls 6 



Shale with concretions 1 4 



Gray nodular limestone with small Ambocoelia. . 1 4 



Dark limestone with ostracodes and Orthoceras 



separated from above by thin shale bed 7 2 



From this point the section is covered for a dis- 

 tance of \ mile, representing an elevation of. . 07 

 Then follow black, typical Marcellus shales (on the 



Steenburg farm) 10 10 



Dark gray limestone, barren in the lower layers 

 with Agoniatites in the middle part and Ortho- 

 ceras and ostracodes, etc. in the upper part. . . 7 6 



134 10 



