Pleu. 



716 



c. 



WMs 



Ge/)IJliVoLz,pLxmih 



341, fig. 347 a, h. Guelph^ or Galt^ formation (over Niagara) 

 in Upper Canada. Vh, 

 Pleurotomaria sphserulata. (Conrad. Jour. Acad. Nat. 



Sci. Phila. Vol. 8, 

 1842, pa^e 272, plate 

 16, fig. 13). Col 

 iett's Indiana Kt. 



1883, plate 32. fig. 1, 



/S'W. T\.32, natural size, large 



individual, tigs. 2, 3, smaller one. Near P. wortheni. Ranges, 



with many variety of form, from Pennsylvania to Utah, in the 



Upper coal measures (especially Indiana coal K). XV. 



Pleurotomaria speciosa, Meek and Worthen. Prac. Acad . 



Nat. Sci. Phil. 1860. M. & 

 W. Geol. 111., Vol. 2, 1866, 

 page 352, plate 28, figs. 5<^, 

 5, G^ Lower coal measures — 

 In Pennsylvania recognized 

 by Stevenson (L, 37) in the 

 Decker'' s creek shale, under the Mahoning sandstone, at Morgan - 

 town, W. Va.— X//7. 



Pleurotomaria subangulata. See Cyclonema subangu- 

 latum. XI, 



Pleurotomaria subconica, Hall. Pal. N. Y. Vol. 1, 1847, 



Black rivers 

 Trenton and 

 Hudson river. 

 — Geology of 

 Canada, 1863, 

 page 180, fig. 



Rogers, page 819, fig. 606. // c, III I, 



Pleurotomaria subglobosa {Pleurotomaria rotundata}. 

 Xl. ^° Ib^L Hall. Trans. Alb. Inst. Vol. 4, 1856. Pleu. suh- 

 glohosa, S. A. Miller's catalogue, 1887). Whit- 

 field, Bull. 3, Am. Mus. Nat. Hist. 1883, plate 9, 

 fig. 10. Collett's Indiana Rt. 1882, page 355, plate 

 ''3Z 32, fig. 10; a well marked, easily distinguished 

 species, both whole and in casts, if the outer whorls are pre- 



