27O NEW YORK STATE MUSEUM 



ew 



1645 ls g± hypoplastotype Hall & Clarke. Paleontology of New 



York. 1892. v. 8, pt i, pi. 4F, fig. 15. 



Waverly beds Meadville Pa. 



1646 ^i hypotype Hall & Clarke. Paleontology of New York. 



1892. v. 8, pt 1, pi. 4F, fig. 16. 



Waverly beds Meadville Pa. 



Orbiculoidea randalli Hall 



1647 "l" type Discina randalli Hall. 16th annual report 



New York state cabinet of natural history. 1863. p. 25. 

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



fig. 34- 



Orbiculoidea randalli Hall & Clarke. Paleon- 

 tology of New York. 1892. v. 8, pt 1, pi. 4E, fig. 18. 



Hamilton beds Near Schoharie N. Y. 



Orbiculoidea (Schizotreta) ovalis Hall & Clarke 



1648 78 1 93 type Orbiculoidea (Schizotreta) ovalis Hall 



& Clarke. Paleontology of New York. 1892. v. 8, pt 1, 

 p. 177, pi. 4E, fig. 4, 5- 



Hall & Clarke. 14th annual report of the New York 

 state geologist. 1895. pi. 2, fig. i2 7 13. 



Trenton limestone Middleville N. Y. 



Orbiculoidea (Schizotreta?) tenuilamellata Hall 



1649 i^^a hypotype Orbicula tenuilamellata Hall. Pal- 



eontology of New York. 1852. 2 : 250. 



Orbiculoidea (Schizotreta?) tenuilamel- 

 lata Hall & Clarke. Paleontology of New York. 1892. 

 v. 8, pt 1, pi. 4F, fig 2. 



Niagaran Hamilton Ont. 



C. D. Walcott, coll. 1878 



1650 1 ^ A hypotype Hall & Clarke. Paleontology of New York. 



1892. v. 8, pt 1, pi. 4F, fig. 3. 

 Niagaran Hamilton Ont. 



C. D. Walcott, coll/ 1878 



Orbiculoidea tullia Hall 



1 65 1 1$^. type Discina tullia Hall. 16th annual report of 



the New York state cabinet of natural history. 1863. p. 28. 



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

 fig. 16, 17. 



Tully limestone Ovid, Seneca co. N. Y. 



