549 



Orthoc. 



Orthoceras emaceratum. Hall. 15th Annual Report, 1862, 



Hall. /5/h.An. f^lr'/8G2 



(omitted from page 78), plate 8, fig. 7. Hamilton, VIII c, 



Orthoceras epigrus. (Hall. Trans. Alb. Inst. Vol. 4, 1856. 

 X/ mi Whitfield, Bull. 3, Am. Mus. N. H., N. Y., 1882, plate 

 * ' 8, fig. 2.) Collett's Indiana Rt. 1882, page 373, plate 

 31, fig. 2, enlarged twice,) type specimen. Resembles 

 Orthis munsterianunn of DeKoninck, but much 

 •7K). 3/v smaller, etc. Suhcarb, Spergen Hill, Ind. — XI, 



Orthoceras exile, Hall. 15th. Annual Report, 1862, page 



,Jici//. /sth.An, ^^-'^62 



.B'^^ 



78, plate 8, fig. 5. Often mistaken for 0, constrictum^ Yan- 

 nuxem ; but always gently, not apruptly, pinched ; septa 

 more distant ; siphuncle larger, and always excentric. Hamilton 

 shales at Cazenovia, N. Y. and Cumberland, Md. — VIII c, 

 Orthoceras filosum. Clarke, Bull. 16, U. S. G. S. 1885, 



viu e' 



iCIk. B.I6. 



P!.2 



