268 NEW YORK STATE MUSEUM 





Orbiculoidea manhattanensis Meek & Hayden (sp.) 

 1632 z^f- 2 - hypotype Discina manhattanensis Meek & 

 Hayden. Proceedings of the Academy of natural sciences 

 of Philadelphia. 1859. p. 25. 



Orbiculoidea manhattanensis Hall & Clarke* 

 Paleontology of New Yoik. 1892. v. 8, pt 1, pi. 4E, 

 fig. 20. 



Coal measures Riley county, Kan. 



Orbiculoidea marginalis Whitfield (sp.) 

 ^33 18 r- hypoplastotype Discina marginalis Whitfield. 

 Annual report of the geological survey of Wisconsin. 

 1880. p. 70. 



Orbiculoidea marginalis Hall & Clarke. Pale- 

 ontology of New York. 1892. v. 8, pt 1, pi. 4F, fig. 17. 



Hamilton beds Cementville Wis. 



Orbiculoidea media Hall 



1634 i^ii. type Discina media Hall. 16th annual report of 



the New York state cabinet of natural history. 1863. 

 p. 27. 



Hall. Paleontology of New York. 1867. v. 4, pi. 2, 



fi g- 25. 



Orbiculoidea media Hall & Clarke. Paleon- 

 tology of New York. 1892. v. 8, pt 1, pi. 4E, fig. 15. 



Hamilton shales Canandaigua lake, N. Y. 



R. P. Whitfield and C. Van Deloo, coll. 1862 



1635 ? 8 2 75 type Hall. Paleontology of New York. 1867. v. 4, 



pi. 2, fig. 26. 



Hall & Clarke. Paleontology of New York. 1892. 

 v. 8, pt 1, pi. 4E, fig. 16. 



Hamilton beds Canandaigua lake, N. Y. 



R. P. Whitfield and C. Van Deloo, coll. 1862 



Orbiculoidea media var. Hall 



1636 -2-Bie- type Discina (sp.?) Hall. 16th annual report of 



the New York state cabinet of natural history. 1863. 

 p. 28. 



Discina media var. Hall. Paleontology of New 

 York. 1867. v. 4, pi. 2, fig. 29. 



Marcellus shale Biidgewater, Oneida co. N. Y* 



F. B. Meek, R. P. Whitfield and C. Van Deloo, coll. 1857 





