2 7% NEW YORK STATE MUSEUM 



Streptorhynchus subplanum Beecher & 

 Clarke. New York state museum memoir i. 1889. P 1 - 2 > 

 fig. 14, 14a. 



Niagaran Waldron Ind. 



C. D. Walcott and C. Van Deloo, coll. 1878- 

 1704 ^p. hypotype Beecher & Clarke. New York state museum 

 memoir 1. 1889. pi. 2, fig. 16, 18. 



Niagaran Waldron Ind. 



C. D. Walcott and C. Van Deloo, coll. 187& 

 i7°5 H— hypotype Beecher & Clarke. New York state museum 

 memoir 1. 1889. pi. 2, fig. 17, 20. 



Niagaran Waldron Ind. 



C. D. Walcott and C. Van Deloo, coll. 187a 



1706 ^p hypotype Beecher & Clarke. New York state museum 



memoir 1. 1889. pi. 2, fig. 19. 



Niagaran Waldron Ind. 



C. D. Walcott and C. Van Deloo, coll. 187& 



1707 3J *f L hypotype Beecher & Clarke. New York state museum 



memoir 1. 1889. pi. 8 (series of 13 growth stages). 

 Niagaran Waldron Ind. 



C. D. Walcott and C. Van Deloo, coll. 1878 

 Orthothetes woolworthanus Hall 



1708 J ^r A hypotype Strophomena woolworthana Hall. 



10th annual report of the New York state cabinet of 

 natural history. 1857. p. 48. 



Streptorhynchus woolworthana Hall. 

 2d annual report of the New York state geologist. 1883. 

 pi. 39, fig. 29. 



Orthothetes woolworthana Hall & Clarke. 

 Paleontology of New York. 1892. v. 8, pt 1, pi. 9, 

 fig. 29. 



Helderbergian Schoharie county, N. Y. 



J. Gebhard purchase 

 parastrophia Hall & Clarke 



Parastrophia hemiplicata Hall 

 1709 ^-^ hypotype Atrypa hemiplicata Hall. Paleon- 

 tology of New York. 1847. 1:144. 



Parastrophia hemiplicata Hall & Clarke. 

 Paleontology of New York. 1894. v. 8, pt 2, pi. 63, 

 fig. 2. 



Trenton limestone Jacksonburg N. Y. 



