298 NEW YORK STATE MUSEUM 



1837 - s - 1 ^ 2 - hypotype Beecher & Clarke. New York state museum 



memoir 1. 1889. pi. 1, fig. 14, 14a. 



Niagaran Waldron Ind. 



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



1838 8 1 3 8 . 3 hypotype Beecher & Clarke. New York state museum 



memoir 1. 1889. pi. 1, fig. 15, 15a. 



Niagaran Waldron Ind. 



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

 1 &39 - 2 ^ A hypotype Beecher & Clarke. New York state museum 

 memoir 1, 1889. pi. 1, fig. 18, 18a. 



Niagaran Waldron Ind. 



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



Rhipidomella leucosia Hall 



1840 81 1 84 type Orthis leucosia Hall. 13th annual report of 



the New York state cabinet of natural history, i860, p. 80. 



Hall. Paleontology 01 New York. 1867. v. 4, pi. 7, 

 fig. 4C-4f. 



Hamilton shales Canandaigua lake, N. Y. 



Rhipidomella livia Billings (sp.) 



1 84 1 81 1 85 hypotype Orthis livia Billings. Canadian journal 



new ser. i860. 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 -S^ 8 -^- hypotype Orthis oblata Hall. 10th 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 ^ 1 hypotype Orthis penelope Hall. 13th annual report 



of the New York state cabinet of natural history, i860. 

 p. 79. 



Rhipidomella penelope Hall & Clarke. Pale- 

 ontology of New York. 1892. v. 8, pt 1, pi. 6A, fig. 10. 



Hamilton shales Canandaigua lake, N. Y* 



