42 Trans. Acad. Sci. of St. Louis. 



1889. Melonites irregularis. Miller, N. Aroer. Geol. Pal., 

 p. 261. 



Body globose and very small. Interambulacral areas 

 composed of from five to seven columns of very small and 

 irregular plates. Ambulacra not quite as wide as the inter- 

 ambulacra, with a shallow ridge in the center of each field. 

 Surface ornamented with coarse granules. 



Geological formation and locality : Upper St. Louis 

 Limestone, St. Louis, Mo. 



4. Melonites multiporus Norwood and Owen. 



1846. Melonites multipora. Norwood and Owen, Amer. 

 Journ. Sci., ser. 2, vol. 2, p. 225, figs. 1-3. 



1847. Melonites multipora. Engelmann, Amer. Journ. Sci., 

 ser. 2, vol. 3, p. 124. 



1850. Palaechinus multipora. D'Orbigny, Prodrome, vol. 



l,p. 154. 

 1852. Melonites multipora. Roemer, Bronn's Leth. Geog., 



Bd. 1, Th. 1, p. 288. 

 1858. Melonites multipora. Desor, Syn., p. 159. 



1861. Melonites multipora. Roemer, Archiv Naturgesch., 

 Jahrg. 21, Bd. 1, p. 312, pi. 12. 



1862. Melonites multipora. Dujardin et Hupe, Echinoder- 

 mes, p. 464. 



1863. Palaechinus multipora. Dana, Man. Geol., p. 313, 

 fig. 536. 



1866. Melonites multipora. Meek and Worthen, Geol. Surv. 

 111., vol. 2, p. 227, figs. 21, 22. 



1867. Palaechinus (Melonites) multipora. Dana, Man. 

 Geol., p. 313, fig. 536. 



1869. Melonites Stewartii. Safford, Geol. Tenn., p. 346, 

 pi. 6, figs. 1 a-d. 



1874. Melonites multipora. Loven, Kongl. Svens. Vetens. 

 Akad. Handl., Bd. 11, No. 7, p. 42. 



1875. Melonites multipora. Quenstedt, Petref. Deutschl., 

 p. 380, tab. 75, figs. 44-50. 



1889. Melonites multiporus. Miller, N. Amer. Geol. Pal., 

 p. 261, figs. 364-366. 



