45^ NEW YORK STATE MUSEUM 



MYTILARCA Hall 



Mytilarca acutirostra Hall 



2822 ^f- Q HYPOTYPE Ambonychia acutirostra Hall. 



Geological survey of Wisconsin; report of progress. 1860. 



Hall, nth annual report of the Indiana state geologist. 

 1882. pi. 27, fig. 28. 



Niagaran Waldron, Shelby co. Ind. 



C. D. Walcott, coll. 1878 



Mytilarca arenacea .sw Mytilarca (Plethomytilus) 

 arenacea 



Mytilarca (Plethomytilus) arenacea Hall 



2823 -2^ TYPE Mytilarca arenacea Hall. Preliminary 



notice of lamellibranchiate shells, pt 2. 1870. p. 20. 



Mytilarca (Plethomytilus) arenacea 

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

 pi. 87, fig. 10. 



Schoharie grit Schoharie N. Y. 



C. Van Deloo, coll. 1862 



Mytilarca attenuata Hall 



2824 2^2 TYPE Mytilarca attenuata Haii Preliminary 



notice of lamellibranchiate shells, pt 2. 1870. p. 23. 



Hall. Paleontology of New York. 1883. v. 5, pt i, 

 plates and explanations, pi. 32, fig. 20. 



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

 pi. 32, fig. 20. 



Chemung beds (drift) Elmira N. Y. 



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

 Mytilarca chemungensis Conrad (sp.) 



2825 sip-a HYPOTYPE Inoceramus chemungensis Conrad. 



Journal of the Academy of natural sciences of Philadelphia. 

 1842. 8:246. 



Mytilarca chemungensis Hall. Paleontology 

 of New York. 1883. v. 5, pt i, plates and explana- 

 tions, pi. 32, fig. 13. 



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

 pi. 32, fig. 13. 



Chemung (?) beds Rockville, Allegany co. N. Y. 



R. P. Whitfield and C. Van Deloo, coll. 1869 



2826 Mf 3 HYPOTYPE Hall. Paleontology of New York. 1883. v. 5, 



pt i, plates and explanations, pi. 32, fig. 14. 



