LOWER CARBONIFEROUS FOSSILS. 521 



much smaller than the form under discussion, and ornamented with closely 

 arranged radiating stride. Thus there is presumptive as well as direct 

 evidence that the individual here referred to C. Icevis Ke} T es is correctly 

 identified. 



Formation and locality : Madison limestone, Crowfoot Ridge, Gallatin 

 Range, top of bed 24 ; J. P. Iddings. Chouteau limestone, Louisiana, 

 Missouri. Burlington limestone, Louisiana, Missouri. 



RHIPIDOMELLA Oehlert, 1880. 

 Rhipiuomella michelini Leveille. 



Terebratula michelini Leveille, 1835: M6m. Soc. Geol. France, 1st series, Vol. II, p. 39, 



PI. II, figs. 11-17. 

 Orthis michelini Tandell and Skutuard, 1847 : Contributions Geol. Kentucky, p. 21. 



Wmcliell (A.), 1865: Proc. Acad. Nat. Sci. Phila., p. 11G. (?) Wiuchell (A.), 



1870 : Proc. Am. Phil. Soc, Vol. XI, p. 251. ( ?) Hall, 18S3 : Second Ann. Rept. 



New York State Geologist, PI. XXXVI, figs. 19-21. 

 Bliipidomella michelini Hall and Clarke, 1892 : Pal. New York, Vol. VIII, Pt. I, pp. 



194-225, PI. 6«, fig. 12. 



This form is rare, and the material almost too poor for identification. 

 As far as it is possible to judge, it is identical with B. michelini as identified 

 from the Waverly of Richfield, Summit County, Ohio, and from Cuyahoga 

 County, Ohio. The latter is a small form, subcircular; width, 9.5 mm; 

 length slightly less, not very gibbous, marked by about one hundred 

 regular strise. 



Bhipidomella michelini occurs in two localities in the Yellowstone 

 National Park. 



Formation and locality: Madison limestone, amphitheater east of 

 Bannock Peak, Gallatin Range, bed 27; east side of Lamar Valley, mouth 

 of Soda Butte Creek; W. H. Weed. Waverly age, south of Louisville and 

 near Lebanon, Kentucky; Newark, Granville, Richfield, Bagdad, etc., 

 Ohio; Shafers, Pennsylvania; Lake Valley mining district, New Mexico. 



