FOSSILS OF THE COAL MKASUKKS. ;>s! 



A\ KTLOi'ECTKx M:GLECTUS, Gemitz sp. 



PL 26, Fig. 7. 



Pectm neglectut, GEKITZ, 1866. Carb. und Dyas in Xeb., p. 33 ; tab. 2, fig. 17. 

 Aricttlopecten negleetvt, MEEK, 1867. Am. Jour. Sci. and Arte, Vol. 45, p. 64. 



Position and locality Upper and lower Coal Measures of Illinois. 



Genus PLEUROPHORUS, King. 

 PLEUROPHORUS OBLOXGUS, Meek .' 



PI. 26, Fig. 6. 

 PUtirophonu oUongtu, MEEK, 1872. Final Report on Nebraska, p. 212. 



Locality and position Upper Coal Measures; Springfield, Illinois. 

 Genus XUCULA, Lamark. 



KUCULA PARVA, McC. 



PI. 26. Fig. 8. 



Xi>fiihi parra. MC('HESNET. I860. Descrip. Xew Pal. Foss., p. 54; and illustrations of same, Proceed. 

 Chicago Acad. Sci., Vol. I, p. 39, pi. 2. fig. 8, a, b, e. 



Position and locality Coal Measures, Danville, Illinois. 

 XUCULA BEYRICHI, v. Schaurotji. 



PI. 26, Fig. 9. 



/ Xiifwla Beyriehi. v. ScnAiiiOTH. 1854. Zeitschr. d. Deutsch: GeoL Gess., VI, p. 551. Tab. 21, fig. 4. 

 GEIMTZ. lel. Dya*., p. 67, Tab. XVIII, rig. 20-24 : also 1866, in Carb. und Dyas. in Xeb., p. 32, 

 Tab. 1, Fig. 36-37. 



Locality unknown : Coal Measures of Illinois. 



GASTEROPODA. 



Genus DEXTALIUM, LiniiaMi>. 

 DENTALIUM ? AXXULOSTRIATUM, M. and TV. 



PI. 29, Fig. 7. 

 Denlalium ? annulostrialum, MEEK and WOHTHKX. Proceed. Acad. Xat Sci., Phila., 1870, p. 45. 



SHELL very small, rather distinctly tapering and slightly 

 arched; aperture and section circular: surface ornamented 



