92 NEW YORK STATE MUSEUM 



55°5 ~^i~~ TYPE: PLASTOTYPE Clarke. New York state museum 

 memoir 6. 1903. pi. 4, fig.23. 



Portage (Naples) beds I 



Bristol hollow, Ontario co. N. Y. 



5506 ^-5-- TYPE: PLASTOTYPE Clarke. New York state museum 



memoir 6. 1903. pi. 4, fig.24. 

 Portage (Naples) beds 



Casbaqua creek, Livingston co. N. Y. 



5507 ^^^^ TYPE Clarke. New York state museum memoir 6. 1903. 



pl.4, fig.25. 



Portage (Naples) beds 



Casbaqua creek, Livingston co. N. Y, 



Pterochaenia elmensis Clarke 



5508 ^^j^-3" TYPE Pterochaenia elmensis Clarke. New York 



state museum memoir 6. 1903. p. 254, pl.4, fig.26. 

 Portage (Naples) beds 



Big Buffalo creek, East Elma Erie co. N. Y. 

 D„ D. Luther, coll. 1897 



5509 ^^1"^" TYPE Clarke. New York state museum memoir 6. 1903. 



pl.4,fig.27. 



Portage (Naples) beds 



Big Buffalo creek, East Elma N. Y. 

 D. D. Luther, coll. 1897 



Pterochaenia fragilis Hall (sp.) 

 (see L un u li c ar d i u m fragilis Hall) 



5510 -f^- HYPOTYPE: HYPOPLASTOTYPE Avicula f r a g i 1 i s Hall. 



Geology of New York; report on the 4th district. 1843. 

 p. 222. 



Lunulicardium fragile Hall. Paleontology 

 of New York. 1883. v. 5, ptr, plates and explanations. 



Pterochaenia fragilis Clarke. New York 

 state museum memoir 6. 1903. pl.5, fig.i. 



Portage (Naples) beds Naples, Ontario co. N. Y. 



J. M. Clarke, donor 



55 1 1 -^y- HYPOTYPE Clarke. New York state museum memoir 6. 



1903- P^-5' fig-2- 



Genesee shale Bristol, Ontario co. N. Y. 



J. M. Clarke, donor 



