Orthis. 



524 





nm 





Orthis michelina; var. burlingtonensis, Hall, 1858, Geol. 



Iowa, 1858, page 596, plate 12, fig. 

 4 a. b, very near O. dubia. XL 

 A shell, numerous in Randall's 

 subdivisions F, G, H, of his sec- 

 lion at Warren, Pa., has been 

 identified as the Waverly O. mi- 

 chelini^ by western geologists. 

 (IIII, p. 305.) It seems to be abundant in the Third moun- 

 tain sand^ (IIII, p. 213,) Occasionally seen in the Conglan- 

 er tte, (IIII, p. 335.) After examination of Randall's speci- 

 mens 9520 A, 9522, 9523, 9524, G. B. Simpson described it under 

 the new name Orthis pennsylvanica. 



Orthis multistriata, Hall, Pal. N. Y. Vol. 3, 1859, plate 



;]5, fig. 



2, a, b, 



c, d, 6. 



Lower 



LLelder- 



h erg, 



Recog- 



niz ed 



by Dr. 



Barrett 



among the many forms of the Loioer LLelderherg (I. C. White's 

 Stormville) limestone at the Port Jervis bend of the Delaware 

 river. G 6, p.l34--F/. 



Orthis musculosa, Hall, Pal. N. Y. Vol. 3, p. 409, pi. 91, 



Hall. 



Pal. N. Y) 



3. XV, 



