TYPE SPECIMENS OF PALEOZOIC FOSSILS 767 



HOLOPTYCHIUS Agassiz 

 Holoptychius americanus Leidy 



4853 -^AIL HYPOTYPE Holoptychius americanus Leidy. 



Journal of the Academy of natural sciences of Phil- 

 adelphia, ser. 2. 1856. 3:159. 



Eastman. lyth annual report of the New York state 

 geologist. 1899. p. 321 (not figured). 



Chemung beds Jefferson, Delaware co. N. Y. 



C. S. Prosser, coll. 1897 



Holoptychius halli Newberry 



4854 -iL TYPE (2 specimens) Holoptychius hallii Newberry. 



United States geological survey monograph 16. 1889. 

 p. 114, pi. 20, fig. 10, loa. 



Catskill sandstone Delhi, Delaware co. N. Y. 



Rev. Mr Fitch, donor 



Ichthyodorulite see Machaeracanthus sulcatus 



MACHAERACANTHUS 



Machaeracanthus sulcatus Newberry 



4855 ^f^ TYPE Ichthyodorulite Hall. Geology of New 



York; report on the 4th district. 1843. P- X 74> n g- 69. 



Machaeracanthus sulcatus Newberry. Na- 

 tional institute bulletin. 1857. p. 6 (no figure given). 



Newberry. Geological survey of Ohio. 1873. v. i, 

 pt 2; Paleontology, p. 305 (no figure given). 



Onondaga limestone Victor, Ontario co. N. Y. 



Geological survey collection 



ONCHUS Agassiz 

 Onchus rectus Eastman 



4856 !&}-& TYPE Onchus rectus Eastman. 1 7th annual report 



of the New York state geologist. 1899. p. 323, fig. 4. 

 Catskill sandstone Ontario and Western railroad 



tunnel between Merrickville 

 and North Walton, Dela- 

 ware co. N. Y. 



C. S. Prosser, coll. 1897 



