Smith.! 240 [Oct. 2, 



cardinal process a little longer. The internal characteristics are imper- 

 fectly illustrated by McChesney {Trans. Chicago Acad. Sci., PI. i, Figs. 

 10, 11). 



Occurrence. — Productus punetatus was found in great numbers in the 

 upper part of the Lower Coal Measures of Conway county, G N., IG W., 

 section 29, on the east bank of Arkansas river, about one mile below the 

 Old Lewisburg ferry. It was also found in the Lou'er Carboniferous at 

 several places in the State. 



Productus semireticulatus Martin, sp., Pctrifacta, Derhiensln, p. 7. 



This well-known cosmopolitan species was found in the Barren or 

 Lower Coal Measures in White county, 8 N., T W., section 33, south- 

 east quarter, and in section 26, southeast quarter. It was also found in 

 the Lower Carboniferous, in the Fayetteville shale, probably Warsaw, 

 in Searcy county, 16 N., 17 W., section 1, southwest quarter of south- 

 west quarter ; in the Boone Chert, upper Burlington or lower Keokuk, 

 in Searcy county, 17 N., 18 W., section 28, and at various other places 

 in northern Arkansas ; in the Marshall shale, probably Warsaw, in 

 Stone county, on Blue mountain, 14 N., 11 W., south of Mountaiu 

 View. 



Genus Rhynchonella, Fischer de Waldheim. RhynchoneUa xita Mar- 

 con. Terehratala uta Marcou, Geol. of N. Amer., p. 58. Rhynchn- 

 nella osagensis Swallow, Trans. St. L. Ac. Sci., 1858, p. 219. E/ii/n- 

 chonella osagensis, F. B. Meek, U. 8. Geol. Sure. Nebraska, p. 179. 

 Rhynchomlla uta Marcou, C. A. White, U. S. Geol. E.rpl. W. of V.i'ith 

 Me rid., iv, p. 128. 



This characteristic Coal Measure species, found in Kansas, Nebraska, 

 Iowa, Missouri, Illinois, Texas and South America (V), was found in the 

 Upper Coal Measures of Sebastian county, 8 N., 32 W., section 12; also 

 in the same horizon on the Poteau mountain, Indian Territory. 



RJiynclionella, sp. indet. 



In the Lower Coal Measures of White county, 8 X., 7 W., section 33, 

 southeast quarter, and of Crawford county, 10 N., 30 W., section 10, 

 southeast quarter of northwest quarter, were found several Phyncho- 

 nellas that could not be specifically determined. 



Genus Terebkatula Lhwyd. Tcrehratnhi haatata Sowerh}', Mineral 

 Coneliology, Vol. v, p. 446. Terebratula, bocidens Morton, Am. 

 Journ. 8c. , Vol. xxix, p. 150. Terebratula bocidens, F. B. Mefi<, 

 U. S. Geol. Suro. Nebraska, p. 187, PI i, Fig. 7. 



Meek {loc. rit.) speaks of the strong resemblance of T. bocidens to 7'. 

 elongata Schlotheim, sp., and T. hastata Sowerby, sp., but is strongly 

 inclined to believe in the specific difierence. Davidson {Monograph Brit. 

 Garb. Brach., Appendix, p. 22G) is inclined to unite T. elongata, T. Ims- 

 tata and T. sujjlata. If Dielasnia bocidens is really identical with 7'. 



