70 NEW YORK STATE MUSEUM 



1 Spirifer vanuxemi Hall (a) 



(aa) in certain layers, specially in the lower part of the zone. 



2 Tentaculites gyracanthus {Eaton) Hall (vr) 



Very near the top of this zone a few specimens only were seen. 



3 Stropneodonta varistriata (Con.) Hall (c) 



4 Beyrichia notata Hall (c) 



5 (Spirorbis laxus Hall (c} 



6 Megambonia aviculoidea Hall (rr) 



7 Meristella laevis (Van.) Whitf. (r} 



8 Rhynchonella (Uncinulus) mutabilis Hall (rr) 



9 Chaetetes (Monotrypella) arbueculus Hall (r> 



10 Crinoid segments (c) 



11 Leperditia alta (Con.) Hall (r) 



12 Beyrichia trisulcata Hall (r) 

 This fauna seems to show that the transitional beds below the- 



base of the massive Pentamerus belong in the Tentaculite lime- 

 stone. 



Feet 



A 7 Pentamerus limestone; very massive, gray lime- 23J=16& 

 stone, forming the upper part of the quarries, in 

 which specimens ofSieberella galeatus 

 (Dal.) H. & C. are very numerous. The junction 

 of the Pentamerus and Tentaculite limestones is 

 well shown at the western end of the cliff, where 

 abundant specimens of S i e b e r e 1 1 a may be 

 seen projecting from the weathered surface of 

 the Pentamerus limestone. 



The following species were collected in this zone: 



1 Sieberella galeatus (Dal.) H. & C. (aa> 



2 Rhynchonella semiplicata (Con.) Hall (c) 



3 Strophonella punctulifera (Con.) Hall (c) 



4 Spirifer perlamellosus Hall (rr) 



5 Chaetetes (Monotrypella) abruptus Hall (r)« 



6 Favosites helderbergiae Hall (?) (r) 



7 Dalmanites micrurus (Green) (rr) 



8 Stropneodonta varistriata (Con.) Hall (r) 



9 Atrypa reticularis (Lin.) Dal. (r) 



