298 NEW YORK STATE MUSEUM 



1837 MP- HYPOTYPE Beecher & Clarke. New York state museum 



memoir i. 1889. pi. i, fig. 14, i4a. 



Niagaran Waldron Ind. 



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



1838 81 3 83 HYPOTYPE Beecher & Clarke. New York state museum 



memoir i. 1889. pi. i, fig. 15, i5a. 



Niagaran Waldron Ind. 



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



1839 8 - L 4 i3 - HYPOTYPE Beecher & Clarke. New York state museum 



memoir i, 1889. pi. i, fig. 18, i8a. 



Niagaran Waldron Ind. 



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



Rhipidomella leucosia Hall 



1840 -S-^j 8 ^ TYPE Orthis leucosia Hall. i3th annual report of 



the New York state cabinet of natural history. 1860. p. 80. 



Hall. Paleontology of New York. 1867. v. 4, pi. 7, 

 fig. 4C-4f. 



Hamilton shales Canandaigua lake, N. Y. 



Rhipidomella livia Billings (sp.) 



1841 81 i 85 HYPOTYPE Orthis livia Billings. Canadian journal 



new ser. 1860. 5: 267. 



Hall. Paleontology of New York. 1867. v. 4, pi. 5,. 

 fig. 4a-4C. 



Onondaga limestone Erie county, N. Y. 



Rhipidomella oblata Hall 



1842 & f^- HYPOTYPE Orthis oblata Hall. loth annual report 



of the New York state cabinet of natural history. 1857. 

 p. 41. 



Rhipidomella oblata Clarke. New York state 

 museum memoir 3. 1900. pi. 8, fig. 14, 15. 



Oriskanian Becraft mountain, Hudson N. Y. 



Rhipidomella penelope Hall 



1843 - 1 ! 8 - 1 HYPOTYPE Orthis penelope Hall. 1 3th annual report 



of the New York state cabinet of natural history. 1860. 

 p. 79. 



Rhipidomella penelope Hall & Clarke. Pale- 

 ontology of New York. 1892. v. 8, pt i, pi. 6A, fig. 10. 



Hamilton shales Canandaigua lake, N. Y. 



