ORISKANY FAUNA OF BECRAFT MOUNTAIN 



73 



formation is exposed near Kingston, along the West Shore railroad 

 one half mile southeast of Rondout creek. 1 



On the Becraft limestone, which is 60 feet thick, lies a very 

 considerable thickness (222 feet) of impure schistose limestones, the 

 " upper shaly " limestone of W. M. Davis, and the Kingston beds of 

 this paper. In the reported section these beds have been subdivided 

 with every variation in the sediment, which is in places a compact blue 

 limestone carrying silicious matter, in others a gray, shaly and argilla- 

 ceous limestone. The fossils of all its layers are those of the true 

 New Scotland limestone faunas, the contents of the higher layers 

 varying little from those of the lower. 



I have identified the following species. (In making this section Mr 

 Van Ingen and Dr Ruedemann divided these beds into 18 subdivisions, 

 numbered from lowest to highest, 4-21. These minor divisions were 

 based solely on slight changes in the character of the sediment. In 

 the list of fossds I quote these subdivisions by number in order 

 to show the range of the species.) 



Dalmanites pleuroptyx, 4, 12, 21 



Phacops logani, 12, 15, 16, 10, 21 



Hoinalonotus vanuxemi, 8, 9, 12, 19 



Acidaspis tubcrculata, 12, 16 



Tentaeulites elongatus, 16, 19, 21 



Cypricardinia lamellosa, 16 



Camarotoechia cf. campbellana, 4 



C. mutabilis, 8 



Eatonia peculiaris, 4, 6, 14 



E. medialis, 9, 19 



Spirifer cyclopterus, 4, 5, 12 



S. perlamellosns, 4, 5 



S. modestus, 12, 16 



Coelospira concava, 4, 20, 21 



Atrypa reticularis, 4 

 Meristella cf. laevis, 4, 5 

 Leptaena rhotnboidalis, 4, 6 

 Stroplieodonta becki, 4, 20, 21 

 Strophonella puuctulifera, 4 

 Rhipidomella oblata, 4, 5, 6, 21 

 Dalmanella subcarinata, 5, 9 

 D. planoconvexa, 12, 14, 15 

 Pholidops ovata, 16, 19, 20, 21 

 Zapbrentis roemeri, 5 

 Duncanella rudis, 9, 12, 14, 16, 20 

 Pleurodictyum lenticulare, 9, 21 

 Hindia fibrosa, 6 



'For the detailed succession here I have largely relied on observations made at 

 my request by Mr Gilbert Van Ingen, who, aided by Dr Rudolf Ituedemann, has 

 carefully collected from all the strata. 



