Richmond Group in Ohio and Indiana. — Nickles. 215 
and also a brief description was given of the species rugosa.* 
The generic name is spelled Strophomenes, as Rafinesque wrote 
it. 
Neither figures nor description seem to the writer to justify 
Hall and Clarke's remark, "We have here a good description 
of this American species accompanied by intelligible figures, 
and although the name has never been current among the nat- 
uralists in this country, there seems sufficient reason to believe 
that it is the same species which was subsequently described as 
Leptaena planumbona, a common fossil in the upper horizon 
of the Hudson River group in the Ohio valley." The very 
brief description given will answer for a number of distinct 
forms, and if the figures were really made from a specimen of 
the form which Hall described in 1847 under the name of Lep- 
taena planumbona, they are very crude indeed, and certainly do 
not represent so as to be recognized the common Strophomena 
planumbona (Hall) of the Liberty beds of the Richmond. 
Some time after the writer had come to this conclusion, he 
came across in an obscure publication confirmatory evidence 
in a paper by S. A. Miller on "Strophomena and the type of 
the genus" (The Natural Science Journal, Vol. I, No. 2, New 
Bedford, Mass., April, 1897, pp. 29-35). Mr. Miller thinks 
that Hall and Clarke are entirely mistaken in identifying plan- 
umbona with de Blainville's rugosa (as figured by Hall and 
Clarke), and thinks the figures suit Hebcrtella inscutpta ( Hall) 
much better. But de Blainville's figures suit H. insciilpta even 
less than Strophomena planumbona. However, it should be said 
that Mr. Miller judged from Hall and Clarke's reproductions 
which have made the striation coarser and fail to show the 
shading of the original figures. 
In 1850 King (Monograph of the Permian Fossils of Eng- 
land, p. 103) in speaking of the genus Strophomena says that 
he has little doubt that the Strophomena rugosa Raf. is identi- 
cal with the recently proposed Strophomena (Leptaena) plan- 
umbona of Hall, basing his opinion upon "its general form, and 
its large valve being concave, and the opposite one convex." 
* "Strophomene rugueuse : Strophomenes rugosa. Ralin. Coqullle bombee 
en dessous, et dont la valve superiSure esl an Den concave et chargfie de pe- 
tites strips rayonnantcs. I.urgeur. un pouce. Fossile de PAmerique septentri- 
ona!e." — (D.F.): r=T>efrance]. Diet. 8c. Vat., li. n. 151. [Shell convex be- 
neath, and with the npuer valve a little concave, and provided with small 
radiating striae. Size, an inch. Fossil from North America.] • 
