NAPLES FAUNA IN WESTERN NEW YORK, PART 2 375 



w i 1 1 i amsa n a Girty, the author also reports from the Styliola limestone 

 of Ontario county and from the Genesee shale on Seneca lake, N. Y. 



In this shale at Moreland, central Kentucky, occurs the plant 

 Kalymma grandis Unger 1 originally described from the Cypridina 

 shales of Thuringia. 2 Though this species has not been found in New 

 York, yet the Styliola limestone here and occasionally the beds above have 

 produced other Thuringian Cypridina shale plants, Cladoxylon mira- 

 b i 1 e Unger and Cordaeoxylon clarkei Daws. The latter of these, 

 Dawson, in the final discussion of the species, regarded as very closely allied 

 to, if not identical with, Araucarites ungeri Goeppert (=A poroxy- 

 lon primigenium Unger). 



Let us note again the fact that, throughout the wide extent of. this shale 

 in the regions considered, it does not at any time attain the thickness which 

 we may ascribe to it in New York, where bathymetric conditions seem to 

 have been more favorable for its accumulation. 3 



The exposures of black shale along the Sydenham river at Alvinston 

 and at Kettle Point (Lake Huron), Ontario, have been recently examined 

 by Mr Luther and show only a slight thickness (15-20 feet, but incomplete 

 at the top), and the bands rest directly on the Hamilton limestones. The 

 organic contents are largely plant remains with Sporangites huron- 

 e n s i s, a few fish plates and an impunctate Lingula, evidently L. 1 i g e a, 

 which is common in the Portage black bands of New York. The beds may 

 for stratigraphic reasons safely be regarded as exemplifying a continuation 

 northwestward from New York of the Genesee and Portage black mud 

 conditions. 



which occurs in both. So it would seem that the fauna and the beds containing it might 

 be properly construed as representing the Devonic black shale beds of New York rather 

 than any one of their component parts. 



'Dawson, W. & Penhallow, D. P. Canadian Record of Science. Jan. 1891. 4:242. 



2 Unger. 



3 A maximum thickness for the black bands in New York, (1) Marcellus, (2) Genesee, 

 (3) Middlesex, (4) Rhinestreet, (5) Dunkirk (2-5 to be included in the Portage), would be 

 about 700 feet. 



