FOSSILS FROM THE NEW YORK LOWER ORISKANY 



Faunal List of the New York Lower Oriskany 



309 



* " phacoptyx Hall 



Phacops n. sp. 28036 



(A caste) cfr. anceps Clarke. 



Homalonotus sp 



Cordania n. sp 



Cyphaspis n. sp 



Proetus n. sp. ? 



" n. sp. B 



Acidaspis tuberculatus Conrad 



Turrilepas sp 



Spirorbis sp 



Autodetus n. sp 



Fish spine 



Tentaculites elongatus Hall. 28006.. . 

 " amla Hall 



2 



14 



°3^ 



c3 





PQ 



104 



c3 



CO 



•f-H 



hi 



o 



a, 

 a, 



P 



31 



Of this Lower Oriskany fauna of 104 species, 45 are specifically identi- 

 fied with described species, and of these no less than 35 occur above, 

 either in the Upper Oriskany or Ulsterian, while 14 are present in the 

 Helderbergian. Doctor Clarke's statement that "this remarkable asso- 

 ciation of species furnishes the missing link in the evolution of the Lower 

 Helderberg into the typical Lower Devonian fauna, 1 ' and Beecher's 

 " from the fossils now known from Becraft's mountain, it is evident that 

 the relations of the fauna contained in the upper beds of the series 

 above the Scutella limestone and just below the [Upper] Oriskany sand- 

 stone are with the latter and not with the Lower Helderberg group " 

 are just. 



It is very desirable that collectors should give attention to gathering 

 more extensive collections from the Upper Pen tarn erns or Becraft about 

 Port Jervis and Schoharie, New York, and also from the Oriskany 

 along the Neversink valley. Such collections will probably demonstrate 

 the intimate relationship of the Becraft and Lower Oriskany formations. 



PENNSYLVANIA AND NEW JERSEY ORISKANY 



At present the Oriskany formation of Pennsylvania and New Jersey 

 is not clearly divisible into a lower and upper member as in New York. 



