166 University Geological Survey of Kansas. r '■[ 



approximate ; surface marked with very fine crowded, concen- 

 tric stripe, which are sometimes more or lessen* exuous. Length 

 of full-grown specimen, 1.30 [inches?] ; height, 0.64; thick- 

 ness, 0.62. " 



Range and distribution : Upper Coal Measures ;" Topeka. 



EDMONDIA. 



de Koninck, Anim. Foss. Carb. Belg., p. 66, (1844). 



Edmondia nebrascensis. Plate XX, fig. 5. 



Astarte nebrascensis Geinitz, Carb. u. Dyas in Neb., p. 16, pi. i, f. 25, 



(1866). 

 Edmondia nebrascensis Meek, Fin. Rep. U. S. Geol. Surv. Neb., p. 214, 



pi. x, f. 8-8b, (1872). 



Meek's description: " Shell subovate, compressed, more or 

 less rounded at the extremities ; length nearly once and'a half the 

 height ; basal margin broadly semielliptic or semiovate in out- 

 line ; dorsal margin sloping from the beaks, but more abruptly 

 in front than behind, rounding into the extremities; beaks 

 moderately prominent, and located somewhat in advance of the 

 middle. Surface marked by broad, rounded, rather regular 

 concentric furrows, separated by sharp, moderately prominent 

 concentric linear ridges, sometimes show under a magnifier in- 

 dications of being minutely crenate ; impressions or furrows 

 between the ridges, showing concentric striae, which, by the aid 

 of a lens, in a cross-light appear to be crossed by fine, nearly 

 obsolete radiating markings. Length of the largest specimen 

 seen, 1.35 inches ; height, 0.95 inch ; convexity, about 0.30 

 inch." 



Range and distribution : Upper Coal Measures ; Kansas City, 

 Turner, Topeka. 



Edmondia aspinwallensis. Plate XXII, figs. 3-3b. 



Edmondia a spin iv all ens is Meek. Fin. Rep. U. S. Geol. Surv. Neb., p. 

 216, pi. iv, ff. 2-2c, (1872); etc. 



Original description : " Shell longitudinally subovate, moder- 

 ately convex, the greatest convexity being a little in advance of 

 and above the middle ; base nearly semielliptic in outline ; pos- 

 terior side rather narrowly rounded, or sometimes very faintly 

 subtruncate obliquely above ; dorsal margin nearly straight just 



