441 



Natic. 



Naticopsis carleyana, {Naticacarleyana^ Hall, Trans. Alb. 

 2i Inst. Vol. 4, 1856.)— Whitfield, Bull. 3, Amer. 

 Mus. Nat. Hist. 1882, p. 71, plate 8, figs 26, 27. 

 — Collett's Ind. Report 1882, page 369, plate 

 31, fig. '2^^natvral 5^^e, back view; fig. 27, 

 vl I ^?)1. magnified Umce. mouth of shell. It is not a 

 /7- 3/. ^^tica because it has no navel (umbilicus). 

 Its appearance is different from all other shells of XI ; often 

 worn smooth ; stricTe gone. — Alton, Spergen Hill, e%c. Ind. Sub- 

 Garhomferous. XL 



Naticopsis howi, Hartt. Dawson's Acad. Geol. 1868, p. 



xfii, n9 ^^^7 fig- 11^7 allied to N. plioistria^ but with deli- 



^^ cate lines of growth on the whorls, and always 



iDaw.' small. Found at several places in Nova Scotia^ 



in Carboniferous limestone. XIII? 



Naticopsis ? {Isonema>) humilis, Meek, Proc. Acad. Nat. 



Sci. Phila., 1871, Corniferous. — Pal. Ohio, 

 Vol. 1, page 215, wood-cut outline of Hall 

 & Whitfield's N. levis. (See Desor, New 

 Sp. Devonian Foss. from Iowa, pi. 12. fig. 

 Ohio.PakL — h'^^^ 3.— Meek). Looks as if it might be the full 

 grown or adult form of Isonema depressa., M. and W., but it 

 has no more volutions, even when ten times as large ; and dif- 

 fers in being less depressed, with rounder and fuller whorls, 

 and a less strongly and regularly striated surface. — VIII a^ 



Naticopsis laevis, (or levis), Meek, Pal. Ohio, Vol. 1, 1873, 



page 215, plate 19, fig. 4 a, natural size^ 

 dorsal side view; 45, opposite side and 

 mouth of shell. Franklin Co., O. Cor- 

 niferous limestone, VIII a. — This is 

 Meek's X. levis of Proc. A. N. S. 1871, 

 not X. Icevis of H. and W. 1872. 



Naticopsis nana, (Meek & Worthen, Illinois Geol. Iit„ 



1866, Vol. 2, plate 31). Collett^s Indiana 

 m^.^^^^ ..^^^ Report of 1883, page 162, plate 36, figs. 6, 



7, enlarged to about twice^ opposite sides of 

 J— - ^ same specimen. Middle and Upper Coal 



)ncl.lS53. Pl'36 from Indiana to Nevada. XIII XV 



