TYPE SPECIMENS OF PALEOZOIC FOSSILS 507 



Ptychopteria expansa Hall 



31 18 £££A TYPE Pty chop teria expansa Hall. Paleontology 



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

 pi. 23, fig. 10, 11. 



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

 pi. 23, fig. 10, 11. 



Chemung beds Smethport Pa. 



C. Van Deloo, coll. 1870 



Ptychopteria proto Hall 



31 19 a^as. type Pty chop teria proto Hall. Paleontology ol 



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

 pi. 23, fig. 12. 



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

 pi. 23, fig. 12. 



Chemung beds Smethport Pa. 



C. Van Deloo, coll. 1870 



3120 *£p- type Hall. Paleontology of New York. 1883. v. 5, pt 1, 



plates and explanations, pi. 23, fig. 14. 



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

 pi. 23, fig. 14. 



Chemung beds Smethport Pa. 



C. Van Deloo, coll. 1870 

 Ptychopteria salamanca Hall 



3121 ^y^ type Ptychopteria salamanca Hall. Paleon- 



tology of New York. 1883. v. 5, pt 1, plates and 

 explanations, pi. 23, fig. 17. 



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

 P 1 - 23, fig. 17. 



Chemung (?) beds Rock City, near Salamanca N. V. 



R. P. Whitfield, coll. 1869 



3122 itafu type Hall. Paleontology of New York. 1883. v. 5, 



pt 1, plates and explanations, pi. 23, fig. 18, 19. 



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

 pi. 23, fig. 18, 19. 



Chemung (?) beds Rock City, near Salamanca N.Y. 



R. P. Whitfield, coll. 1869 



3123 "V ; type Hall. Paleontology of New York. 1883. V, 5, 



pt 1, plates and explanations, pi, 23, fig, 20. 



