FCKSSILS OF THE COAL MEASURES. 571 



Genus SYXTRIELASMA, M. and W. 



Sn&RISLASVA HEMIPLTCATA, Hall's Sp. 

 PI. -X. Fig. -20. 



Spirifer hnniplirata. HAI.I, 185-2. Stansbury's Salt Lake Report, p. 409 .- pi. 4. fig. 3. 

 Syntritburma hemiplifata, MKRK and WORTHEX. lt"6C. Report Geol. Survey of HI.. Vol. II, p. :i-23 -, fig. 

 36, and p. 324, fi. 



>>H and locality Upper Coal Measures: twelve miles north of 

 Vandalia, Fayette county. Illinois. 



Genus MEEKELLA, White and St. John. 

 MKKKKLLA STKIATO-COSTATA, Cox sp. 



PI. -X. Fig. 21. 



Plifatula ttriato-cottata. Cox. lt>57. Owen's Geol. Report of Ky., Vol. Ill, p. .168 : pi. 8. fig. 7. 

 3feektUa ttriato-cvxtata. WHITK and ST. Joux. Ie67. Trans. Chicago Acad. Sci.. Vol. I. pp. 1-20 i-> 

 1. "> and 6. 



Positi<tn (i ml locality La Salle. Caseyville ami various other localities 

 in Illinois: in upper and lower Coal Measures. 



(ienus RHYXCHOXELLA, Fischer. 

 BHTNCHOMELLA OSAGEXSIS. Swallow. 



PI. -26. Fig. -22. 



RhynehontUa (Camarophoria) Osag?n*it. SWALLOW, 1858. Trans. St. Louis Acad. So.. Vol. I, p. -219. 

 Tertbratula Ufa. MABCOI' T 1?58. Geol. X. Ain" p. 51 ; pi. 6, fig. li 



Position and locality Coal Measures, Dauville, Illinois; and roof of 



Coal Xo. <>. Fulton county. Illinois. 



Genus ORTHIS, Dalnian. 



ORTHIS CAHBOXARIA. Swallow. 



PL 23. Fig 4. 

 Orthis earbonaria. SWALLOW. Trans. St. Louis Acad. Sci.. Vol. L, p. 21 S. 



Position and locality Upi^er Coal Measures : La Salle. Illinois. 



