92 Trans. Acad. Sci. of St. Louis. 



172Posser (C. S.). Comparison of the Carboniferous and 

 Permian Formations of Nebraska and Kansas. 

 Journ. Geol., vol. 5, 1897. 



1 173 Quenstedt (F. A.). Petrefactenkunde Deutschlands. 

 Bd. 3, Abth. 1, EchinodermeD, 1875. 



*174 Roebuck (W. D.). Bibliography: Papers and records 



published with respect to the natural history and 



physical features of the North of England. Echi- 



nodermata 1884 to 1892. 

 Naturalist, 1894. 



1 175 Roemer (F.). Ueber den Bau von Melonites. 

 Wiegmann's Archiv, Jahrg. 21, bd. 1, 1855. 



*176 . Lethaea Paleozoica. 1876-1883. 



Rogers (A. F.). See (23 and 24). 

 Ruedemann (Rudolph). See (33). 



1 177 Safford (James M.). Geology of Tennessee. Nash- 

 ville, 1869. 



St. John (O.). See (228). 



178 Salter (J. W.). On some New Palaeozoic Starfishes. 

 Ann. Mag. Nat. Hist., ser. 2, vol. 20, 1857. 



*179 Sandberger (G.) u. (F.). Versteinerungen des Rhein- 

 ischen Schichtensystems. 



180 Schluter (Clem.). Ein neuer Echinide (Xenocidaris 

 conifera) aus dem Mittel Devon der Eifel. 



Verhdl. Naturw. Ver. Preuss. Rheinl. u. Westf. Sitzb.,bd. 

 38. Bonn, 1881. 



|181 Schmidt (F.). Miscellanea Silurica II. 



M£m. Acad. Imp. St. Petersbourg, ser. 7, vol. 21, no. 11, 1874. 



1 182 Schultze (L.). Monographic der Echinodermen des 

 Eifeler Kalkes. 



Denkschr. K. Akad. Wiss. Wien, Math. Naturw. CI., no. 

 26, 1866. 



