713 



Pleu. 



pro.A.NSm 



Pleurotomaria modesta, Keyes. Proc. Acad. Nat. Sc. 



^^ Phila., 1888, page 238, plate 12, 

 'figs. 2 a, 5, a beautiful little whorl- 

 shell from the lately discovered 

 very fossiliferousZ<9i^e^^ coal No. 3, 

 (= No. 7 of 111.) pyritous roof 

 shale, containing at least 35 genera 

 and 60 species, at Des Moines, Iowa, just over the St. Louis 

 limestone (X// being absent.) Possibly identical with P, 

 depressa^ Oox, a name however pre-occupied by Phillips in 

 1836 for another shell.— X//7. 



Pleurotomaria nodulostriata. Hall, Trans. Alb. Inst., 

 Xl 5 Vol. 4, 1856. Whitfield, Bull. 3, xlm. Mus. Nat 



Hist. N. Y., plate 9, fig. 5.— Collett's Indiana Et. 

 1882, page 352, plate 32, fig. 5, magniiied four 

 times ; medium specimen. To be known by its 

 depressed conical spire, almost cut off (truncat- 

 ed); granulated surface produced by cross stride. 

 Spergen Hill, etc., Iniiana. Subcarhoniferous, XI, 

 Pleurotomaria pervetusta. See Euomphalus pervetustus, 

 Pleurotomaria ? nucleolata, Hall, Pal. N. Y. Vol. 1, 1847, 



p. 42, plate 10, fig. 6 a, nat size ; 6 S, en- 

 larged ; the last whorl composing almost the 

 entire shell ; a small distinct species observed 

 P , ,,. by Hall at no other horizon but that of the 

 Voi.u upper part of the Bird'^s-eye limestone forma- 

 tion^ at Watertown, Jefferson Co., N. Y. — In Pennsylvania 

 found by H. D. Rogers (Geol. Pa., 1858, Vol. 2, page 817.)— 

 Trenton [.^] II c. 



Pleurotomaria occidens, Hall, 20th Regents Rpt. N. Y. 



1867, Niagara. Pal. Ohio, 

 ^ ..-^J-\^ Vol. 2, 1875, page 142, plate 

 "*^^^ §^ gg^ 2, side view of aper- 

 ture and volutions, streaked 

 with strong revolving lines, 

 or ridges, and apparently 



also with cross lines ; shell 

 flatter in Ohio than in States 

 further west, probably because of greater weight of Coal mea- 



<?^z 



6 (, 



