BRACHIOPODS. 77 



Spirifera perlamellosa? HALL. 



Spirifer lamellosus Hall, 1857 : Reg. Kep. Univ. New York, p. 57. 

 Spinjer lamellosus Hall, 1859 : Pal. New Yoik, vol. Ill, p. 291, pi. xxvi, 



tigs. 1-2. 

 Spinfer lamellosus Meek & Worthen, 1868: Geol. Sur. Illinois, vol. Ill, p. 



284, pi. vii, tigs. 9a-b. 



A small shell with large, rounded, radiating folds, and 

 imbricated lines of growth. 



Horizon and Localities Upper Silurian limestone : Bai- 

 ley landing (Perry county). 



This form is reported by Meek & Worthen from Missouri, 

 but it probably cannot be regarded as strictly identical with 

 the New York species described by Hall. 



Spirifera parryana HALL. 



Plate xl, figs. 4a-b. 



Spirifer euruteines Owen, 1852: U. S. Geol. Sur. Wisconsin, Iowa and 



Minnesota, p. 586, tab. iii, figs. 2-2a and 6-6a. (Not Owen, 1844.) 

 Spirifer parryanus Hall, 1858: Geology Iowa, vol. I, p. 509, pi. iv, figs. 



8a-b. 



Spirifer capax Hall, 1858: Geology Iowa, vol. 1, p. 520, pi. vii, figs. 7a-d. 

 Spirifer fomacula Meek & Worthen, 1868 : Geol. Sur. Illinois, vol. Ill, p. 



433, pi. xiii, figs. 8a-e. ( Not Hall, 1857.) 

 Spirifera par? y ana Calvin, 1888: Bui. Lab. Nat. Hist. State Univ. Iowa, 



vol. I, p. 19. 



A rather large, robust form with broad area. 

 Horizon and localities Devonian, Hamilton? limestone: 

 Perry county. 



Spirifera ligus OWKN. 



Spirifer ligus Owen, 1852 : U.S. Geol. !Sur. Wisconsin, Iowa and Minne- 

 sota, p. 585, tab. iii, fig. 4. 



Spirifer permatus Owen, 1852: U. S. Geol. Sur. Wisconsin, Iowa and 

 Minnesota, p. 585, tab. iii, figs. 3-3a. 



Spirifer perextensus Meek & Wcrthen, 1868: Geol. Sur. Illinois, vol. II, 

 p. 414, pl.x, figs. la-d. 



Spirifera atwaterana Miller, 1878 : Proc. Dav. Acad. Sci., vol. II, p. 221. 



A large, very variable form, with long hinge line and usu- 

 ally rather broad cardinal area. 



Horizon and localities Devonian, Hamilton? limestone : 

 Perry county. 



