MURC. 



430 



Murchisonia maia, Hall. 14th Annual Report of New 



h plate 4, fig. 11. — Upper Helderlerg for- 

 mation^ Villa. 



Murchisonia milleri. ( M. hicincta. ) Rogers' Geology of 

 CO Pennsylvania, 1858, page 817, fig. 593 Tren- 

 5^ ton & Loraine formations. (Hall, Pal. N. 

 Y. Vol. 1, 1847. First name pre- occupied by 

 McCoy in 1844.)— //c, /// 6. 



Murchisonia obsoleta. See Appendix, 



Murchisonia serrulata, Salter. Cana- 

 dian Organic Remains, Decade 1, 1859, Black 

 River formation. Geol. Can. 1863, page 145, 

 fig. m.—IIc. 



Murchisonia terebriformis. (Hall. Trans. Alb. Inst. 



Ind.mz 



1856, Vol. 4. Whitfield Bull. 3, Amer. 

 Mus. Nat. Hist. 1882, plate 3, figs. 15, 16) 

 Collett's Indiana Rt. 1883, page 362, plate 

 32, fig. 15, enlarged twiee^ type specimen ; 

 fig. 15, last volution still further enlarged. 

 — Subcarhoniferous. — XI. 



Murchisonia turricula. Billings, Rt. of Progress, Can- 

 ada, 1857, Middle Silurian. Hall, 15th 

 Annual Report New York, 1862, page 50, 

 plate 4, fig. 13, much enlarged. Surface 

 marked by strong concentric raised striae 

 above the band, and lower striae below it. Suture line deep, 

 and continued beyond the edge of the lip in a slender spiral 

 line. Length only \ inch. Like M. desiderata^ but whorls 

 more angular, suture deeper, striae stronger. Hamilton., VIII c. 



Murchisonia turritella. (Hall, Trans. Alb. Inst., 1856, 

 '^j Vol. 4.— Whitfield, Bull, 3, 1882, plate 9, fig'. 



12.) CoUett's Indiana Report of 1882, page 

 361, plate 32, fig. 12, enlarged twice. Spergen 

 IncL iSn . ^ Hill, Indiana. Subcarloniferous. XI 



H. /^?/ 



pLU- 



