GEOLOGY AND PALEONTOLOGY OF THE SCHOHARIE VALLEY 



13 



at the base of the Coeymans in the cliffs in the eastern part of 

 the village. It is one of the first crinoids found in this region, 

 and one of the most beautiful. L e p a d o c r i n n s geb- 

 hardi [fig. 34] is also abun- 

 dant in this formation, the 

 tapering steins being frequently 

 found. The nutlike head, com- 

 posed of irregular plates, is 

 easily recognized. The species 

 belongs to the group of the 

 Cystoids. 



Among the brachiopods, 

 Stropheodonta v a r i s - 

 t r i a t a [fig. 35] is the most 

 abundant and characteristic of 

 the lower beds. It is fre- 

 quently larger than in the 

 Manlius. Other characteristic 

 brachiopods are : G a m a r o - 

 t o e c h i a s e m i p 1 i c a t a 

 [fig. 36], a small species, smooth in the upper portions and with 

 a few small plications near the base; very abundant in some of 

 the layers and represented by a variety [see fig. 27 a h] in the 



transition beds at the top of 

 the Manlius ; U n c i n u 1 u s 

 m u t a b i 1 i s [ tig. 37], a 

 robust, rounded form with 

 numerous rather faint and 

 rounded plications, and pro- 

 nounced anterior emargination, 

 often occurs in considerable 

 abundance ; A t r y pa r e t i C u 1 a r i s [tig. 38], generally 

 robust and easily recognized by the unequal convexity of the 

 valves and the reticulated surface markings, and Si eh e re 11 a 

 galeata [fig. 3!)], easily recognized by its form, the strong 

 overarching beak of the pedicle valve and the strong rounded 



Fig-. 34 Lepadocrinus gebhardi 



Fig-. 35 Stropheodonta varistriata 



