TYPE SPECIMENS OF PALEOZOIC FOSSILS 409 



Leptodesma arciforme Hall 



2521 ^j 3 ^ type Leptodesma arciforme Hall. Paleon- 



tology of New York. 1884. v. 5, pt 1, p. 229, pi. 91, fig. 12. 

 Upper Chemung beds Mansfield, Tioga co. Pa. 



A. Sherwood, coll. 187 1 



Leptodesma becki Hall 



2522 * type Leptodesma becki Hall. Paleontology of 



New York. 1883. v. 5, pt 1, plates and explanations, 

 pi. 22, fig. 4. 



Hall. Paleontology of New York. 1884. v. 5, pt 1, 

 pi. 22, fig. 4. 



Chemung beds Portville, Cattaraugus co. N. Y. 



R. P. Whitfield, coll. 1869 



Leptodesma billingsi Hall 



25 2 3 -O.3.1.5. type Leptodesma billingsi Hall. Paleontology 



of New York. 1884. v. 5, pt r, p. 192, pi. 89, fig. 12. 

 Chemung (?) beds Panama, Chautauqua co. N. Y. 



J. Hall, coll. 1870 



2524 ■ 2 - 1 2 - LA type Hall. Paleontology of New York. 1884. v. 5, 



pt 1, pi. 89, fig. 13. 



Chemung beds Along Chemung river above 



Elmira N. Y. 

 A. Sherwood, coll. 1871 

 On slab with type of L. spinigerum, Pal. N. Y. v. 5, 

 pt 1, pi. 89, fig. 1 ; and L . a g a s s i z i . pi. 89, fig. 17. 



2 5 2 5 type Hall. Paleontology of New York. 1884. v. 5, 



pt 1, pi. 89, fig. 14. 



Chemung (?) beds Panama N. Y. 



J. Hall, coll. 1870 



2526 type Hall. Paleontology of New York. 1884. v. 5, 



pt i, pi. 89, fig. 15. 



Chemung beds Between Corning and Elmira N. Y. 



A. Sherwood, coll. 187 1 



Leptodesma biton Hall 



2527 9 \ 16 type Leptodesma biton Hall. Paleontology of 



New York. 1884. v. 5, pt 1, p. 222, pi. 91, fig. 1. 



Upper Chemung beds South of Smethport Pa. 



C. Van Deloo, coll. 1870 



