524 NEW YORK STATE MUSEUM 



Station 7. Peoble's island, Waterford 



In a similar black slate on Peoble's island (station 7), in the 

 Hudson river opposite Waterford and about 2 miles southwest of 

 Layeny's point, were found: 



Climacograptus tj^picalis, Hall 



Leptobolus insignis, Hall 



Station 8. Van Schaick island 



This large island lies directly south of Peoble's island and 

 forms a part of the city of Cohoes. The construction of a sewer 

 system provided here a good opportunity of collecting in the com- 

 pact, black, carbonaceous shales of the northern part of the is- 

 land. The shale contains: 



Diplograptus foliaceue, Murcliison sp. cc 



D. putillus, Hall, r 



Cryptograptus tricornis, Garruihers (=Diplograptus marcldus, 

 EalT) V 



Cameroceras proteiforme, Hall sp. r 



Leptobolus insignis, Hall, r 



'Schizocrania filosa. Hall, r 



While the general character of the rock and fauna is distinctly 

 that of Utica beds, the occurrence of Cryptograptus tri- 

 cornis is wholly unexpected and difficult of explanation, as 

 this graptolite thus far has been, in America, observed only as a 

 member of the upper and lower Dicellograptus faunas, and in 

 Scotland is restricted to the Glenkiln shales, which are homotaxial 

 with the Normans kill or lower Dicellograptus shales. The pres- 

 ence of this graptolite points evidently to a position of these beds 

 at the base of the Utica horizon. 



Station 9. North shore of Green Island 



In the bluff along the northern shore of Green Island, directly 

 west of the railroad bridge, several fossil-bearing bands were 

 found in the shales. Two of these were calcareous, and consisted 

 almost entirely of valves of brachiopods, a third was a black 

 compact mudstone, which in one place was highly charged with 

 fossils. The fossils collected were: 



