456 



XEW YORK STATE MUSEUM 



2822 



9 5 5 

 1 



9551 



2»23 *^ 



MYTILARCA Hall 



Mytilarca acutirostra Hall 



hypotype Ambonychia acutirostra Hall. 



Geological survey of Wisconsin; report of progress, i860. 



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^ Mytilarca (Plethomytilus) 



arenacea 



Mytilarca (Plethomytilus) arenacea Hall 

 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 1, 

 pi. 87, fig. 10. 



Schoharie grit Schoharie N. Y. 



C. Van Deloo, coll. 1862 



Mytilarca attenuata Hall 

 type Mytilarca attenuata Hall, 

 notice of lamellibranchiate shells, pt 2. 1870 



Hall. Paleontology of New York, 

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

 Hall. Paleontology of New York, 

 pi. 32, fig. 20. 



Chemung beds (drift) 



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



Mytilarca chemungensis Conrad (sp.) 

 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 1, plates and explana- 

 tions, pi. 32, fig. 13. 



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

 pi. 32, fig. 13. 



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



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

 2826 ^p hypotype Hall. Paleontology of New York. 1883. v. 5, 

 pt 1, plates and explanations, pi. 32, fig. 14. 



2S24 ^ 



95 5 2, 



1883. 



1884. 



Preliminary 

 . p. 23. 

 v. 5, pt I, 



v. s, pt 1, 



Elmira N. Y. 



282 



9553 



