LAMELLIBRA.NCHS. 131 



Horizon and localities Upper Carboniferous, Upper Coal 

 Measures: Kansas City. 



Chaenomya leavenworthensis (MBBK & BAYDEN). 



Allorisma leavenworthensis Meek & Hayden, 1853: Proc. Acad. Nat. Sci., 



Phila., p. 263. 

 Chcenomya leavenworthensis Meek, 1864 : Pal. Upper Missouri, p. 43, pi. ii, 



figs. la-c. 

 Chcenomya leavenworthensis Meek, 1872: U. S. Geol. Nebraska, p. 216, pi. 



ii, fig. 9. 



Somewhat smaller than C. minnehaha, and having the beaks 

 set farther back than in that species. 



Horizon and localities. Upper Carboniferous, Upper Coal 

 Measures: Kansas City. 



Cardiomorpha triangulata SWALLOW. 



Cardiomorpha triangulata Swallow, 1860 : Trans. St. Louis Acad. Sci., 

 vol. I, p. 655. 



Somewhat larger than C. missouriensis, and more triangular 

 in outline. 



Horizon and localities Lower Carboniferous, Chouteau 

 (Kinderhook ) limestone : Cooper county. 



Cardiomorpha missouriensis SHUMARD. 



Cardiomorpha missouriensis Shumard, 1858: Trans. St. Louis Acad. Sci., 

 vol. I, p. 207. 



Shell small, like an Allorismi in general appearance, but 

 having larger umbonal regions. 



Horizon and localities. Upper Carboniferous, Lower Coal 

 Measures : Charboniere ( St. Louis county ), Lexington (Lafay- 

 ette county). 



Spurious and Doubtful Species. 



Allorisma cuneata Swallow, 1858: Trans. St. Louis Acad. Sci., vol. I, 



p 210. Coal Measures : Lexington. Not recognizable. 

 Allorisma lata Swallow, 1858: Trans. St. Louis Acad. Sci., vol. I, p. 650. 



Coal Measures: Lexington. Cannot be identified. 

 Aviculopecten williamsi Meek, 1871: Proc. Acad. Nat. Sci., Phila., p. 178. 



Chouteau limestone : Chouteau Springs. Cannot be identified. 

 Cardinia occidentalis Swallow, 1860: Trans. St. Louis Acad. Sci. , vol.1, 



p. 665. Chouteau limestone^: Cooper county. Not recognizable. 



