552 



NEW YORK STATE MUSEUM 



3400 type Hall. Paleontology of New York. 1859. v. 3, 



pi. 63, fig. 8. 



Helderbergian Schoharie N. Y. 



3401 type Hall. Paleontology of New York. 1859. v. 3, 



pi. 63, fig. 9 a, 9b. 



Helderbergian Schoharie N. Y. 



Platyceras symmetricum Hall 



3402 i£-J2_3 type Platyceras symmetricum Hall. Descrip- 



tions of new species of fossils from the Upper Helderberg, 

 Hamilton and Chemung groups. 1861. p. 6. 



Hall. Illustrations of Devonian fossils. 1876. Gaster- 

 opoda, pi. 3, fig. 22-24. 



Hall. Paleontology of New York. 1879. v. 5, pt 2, 

 pi. 3. fig. 22-24. 



Hamilton shales West Bloomfield, Ontario co. N. Y. 



Platyceras thetis Hall 



3403 Yi 2 ^ type Platyceras thetis Hall. Descriptions of new 



species of fossils from the Upper Helderberg, Hamilton 

 and Chemung groups. 1861. p. 4. 



Hall. Illustrations of Devonian fossils. 1876. Gaster- 

 opoda, pi. 3, fig. 13, 14. 



Hall. Paleontology of New York. 1879. v. 5, pt 2, 

 pi. 3, fig. 13, 14. 



Hamilton shales West Bloomfield, Ontario co. N. Y. 



3404 10 | 24 type Hall. Illustrations of Devonian fossils. 1876. Gas- 



teropoda, pi. 3, fig. 15. 



Hall. Paleontology of New York. 1879. v. 5, pt 2, 



pl- 3, % *5- 



Hamilton shales Canandaigua lake, N. Y. 



C. A. White and C. Van Deloo, coll. i860 



3405 g * type Hall. Illustrations of Devonian fossils. 1876. Gas- 



teropoda, pl. 3, fig. 16. 



Hall. Paleontology of New York. 1879. v. 5, pt 2, 

 pl.3, fig. 16. 



Hamilton shales Bellona N. V. 



J. W. Hall and C. Van Deloo, coll. 1866 



Platyceras thetis? var. subspinosum Hall 



3406 lp f type Platyceras thetis? var. subspinosum 



Hall. Illustrations of Devonian fossils. 1876. Gaster- 

 opoda, pl. 3, fig. 30. 



