92 NEW YORK STATE MUSEUM 



C. modestus Ruedemann 

 Retiograptus geinitzianus Hall 



The black shale in a small railroad cut north of the Schuylerville 

 station proved quite f ossilif erous.^ It has furnished : 



Corynoides gracilis Hopkinson 

 Didymograptus subtenuis {Hall) 

 Leptograptus flaccidus miit. trentonensis Rued. 

 Dicranograptus ramosus Hall 

 Climacograptus bicornis Hall 

 C. parvus Hall 



Graptospongia pusilla Ruedemann^ 

 Leptobolus walcotti Ruedemann 



This shale with its characteristic Normanskill fauna is intercalated 

 in the white beds. 



The shale and white beds abutting at the north and south against 

 the Northumberland plug were found to contain Didymograp- 

 tus Sagittarius, showing that the plug is undoubtedly sur- 

 rounded by Normanskill shale. 



The black cherty band at Clarke's Mills mentioned above contains 

 Climacograptus parvus, which also is restricted to the 

 Normanskill shale. 



Black shale, associated in the Willard mountain region with the 

 white beds, contains : 



Corynoides gracilis Hopkinson 

 Didymograptus sagitticaulis Gurley 

 Dicranograptus ramosus Hall 

 Dicellograptus sextans Hall 

 Cryptograptus tricornis (Carruthers) 



and the white beds capping this mountain are hence also undoubt- 

 edly of Normanskill age. 



A good Normanskill fauna was also collected in shales asso- 

 ciated with the six-foot bed of chert on the east shore of Saratoga 

 lake, namely: 



Corynoides gracilis Hopkinson 

 Dicranograptus ramosus Hall 



1 This locality was pointed out to the writer years ago by Prof. J. B. 

 Woodworth. 



2 The originals of this sponge (described in N. Y. State Mus. Mem. ii, 

 1908, p. 485) came from this locality. 



