REPORT OF THE STATE PALEONTOLOGIST I903 181 



HELDERBERGIAN SPECIES 

 Favosites helderbergiae Zaphrentis roemeri 



F. sphaericus Rensselaeria cf. aequiradiata 



MANLIUS SPECIES 

 Whitfieldella ? nucleolata Stropheodonta varistriata 



I Beyrichia? 



Notwithstanding the absence of Gypidula galeata I have 

 I, no hesitancy from the above fauna in placing the Favosites bed in 

 the Coeymans Hmestone group. For detailed discussion of this bed 

 ' see C 2, F 2 and FI 2. 



Coeymans (proper) middle and upper 



The Coeymans (proper) is a heavy bedded, dark gray limestone, 

 about 40 feet thick. It is usually very coarsely crystalline, being a 

 typical calcarenite. The lower portion is chert free but in the upper 

 part occur thin chert bands, % of an inch to i inch thick. It is 

 characterized throughout its whole thickness by an abundance of 

 I specimens of Gypidula galeata. 



! The chert free beds contain in abundance U n c i n u 1 u s 

 i n u c 1 e o 1 a t u s , U . p y r a m i d a t u s , R h y n c h o s p i r a 

 formo'sa, Spirifer cyclopterus, Atrypa retic- 

 ularis, Favosites helderbergiae and F. sphaer- 

 icus, while in the chert-bearing beds we meet such typical New 

 Scotland forms occurring very abundantly as Meristella 

 laevis, Streptelasma strictum, Leptaena 

 r h o m b o i d a 1 i s , D a 1 m a n e 1 1 a s u b c a r i n a t a and 

 D e 1 t h y r i s p e r 1 a m e 1 1 O' s a . Some of the chert bands con- 

 1 tain vefy many bryozoa ; specially abundant are Orthopora 

 !| r h o m b i f e r a, O . r e g u 1 a r i s , U n i t r y p a p r a e c u r s a 

 ! and L i o c 1 e m a c e 1 1 u 1 o s u m . L i c h e n a 1 i a t o r t a is 

 I found abundantl\' in both the upper and lower parts of the Coey- 

 ! mans. The Coeymans or pre-New Scotland species found here are 

 ' R h }' n c h o n e 1 1 a s e m i p 1 i c a t a ? , Stropheodonta 

 varistriata and G y ]) i d u 1 a galeata. Thus it is seen 

 j that the chert-bearing beds form a transition from the Coeymans to 

 ■ the New Scotland. Rut principally on the ground that no specimen 



y 



