41 6 NEW YORK STATE MUSEUM 



Hall. Paleontology of New York. 1884. v. 5, pt i r 

 pi. 21, fig. 32; pi. 89, fig. 10. 



Chemung beds Portville N. Y. 



R. P. Whitfield, coll. 1869 



2570 -S^P TYPE Hall. Paleontology of New York. 1884. v. 5, 



pt i, pi. 89, fig. ii. 



Chemung beds Little Genesee, Allegany co. N. Y. 



C. Van Deloo, coll. 1863 



Leptodesma mytiliforme Hall 



2571 2-Zf-S- TYPE Leptodesma mytiliforme Hall. Paleon- 



tology of New York. 1883. v. 5, pt i, plates and expla- 

 nations, pi. 25. 



Hall. Paleontology of New York. 1884. v. 5. pt i r 

 pi. 91, fig. 23. 



Upper Chemung beds Smethport Pa. 



C. Van Deloo, coll. 1870 



Leptodesma nereus Hall 



2 572 23.^ TYPE Leptodesma nereus Hall. Paleontology of 



New York. 1884. v. 5, pt i, p 217, pi. 90, fig. 31. 

 Upper Chemung beds Canton, Bradford co. Pa, 



A. Sherwood, coll. 1871 



2573 2 TYp E Hall. Paleontology of New York. 1884. v. 5, 



pt i, pi. 90, fig. 32. 



Chemung beds Mansfield Pa. 



A. Sherwood, coll. 1871 



2574 - s /^- TYPE Hall. Paleontology of New York. 1884. v. 5, 



pt i, pi. 90, fig. 33. 



Upper Chemung beds Canton Pa. 



A. Sherwood, coll. 1871 



Leptodesma orcus Hall 



2575 &3ASI TYPE Leptodesma orcus Hall. Paleontology of 



New York. 1884. v. 5, pt i, p. 215, pi. 90, fig. 23. 

 Chemung beds Mansfield Pa. 



A. Sherwood, coll. 1871 



Leptodesma erodes Hall 



2576 - 2 -- 3 ! 11 TYPE Leptodesma orodes Hall. Paleontology of 



New York. 1883. v. 5, pt i, plates and explanations, 

 pi. 25, fig. 6. 



