The description is based ehielly upon ;i number of -ilicitied shells from 



Tennessee which we owe to the kin- In.--- of IVof. .1. M. Sallord. The-e diller, so far 

 as we can -ee. fnun the Canadian type- of tin only in having the upper side 



of the volution* a tritle more convex. It. lanrftitin<i Hillings sp.. from the Calcifemn- 

 of Canada, i- closely relatel hut i- readily di-tinguished l>y the ranch deeper and 

 wider -inn- in the outline of it- lower lip. 



Fbrrnatvm and locality. The orlglnml type* an- from th<- Ulack Kivcr lime* tone at Allumotte Inland, 

 In th.- < Htawa rlvi-r. Canada. :ioeMee ( "iin- inun an niulvalfnl horl/oii near Lebanon. 



If the >peclM occurs In MlnneeoU It will probably U- found In ih>- Ct>-tKHlonta 



If \riu-i.-MiN \ nK.NTirci.ATA, M. /> (Ulrirh.) 



I'l Ml I. XVIII. FI08. JI-0. 



This species is very closely allied to ft. /<//>/</</ Salter, yet there should be little 

 trouMo in ilistin^ui.shing good specimens. Carefully compared we find that in the 

 new species the umbilicus is much narrower, the hight of the shell relatively 



itr, the sutures deeper because the edge of the whorls projects somewhat over 

 the top of the succeeding volution, the aperture is a little more oblique and the 

 periphery of the whorls less acute. Further, there is to be observed, especially on 

 casts of the interior, an obscure ridge running parallel with but some distance 

 beneath the peripheral carina. Finally, the peripheral edge is minutely toothed, a 

 character that does not occur on the even better preserved examples of It. 1api<-i<l<i 

 seen by us. At present we know of no other species with which it need be 

 compared. 



formation and locality. Top of the black River Kroup, Mercer county, Kentucky. 

 OoUtctxm.-R. O. Ulrlch. 



II'APHISTOMINA MODESTA. n. sj>. (t'/n'r/i.) 



I'l \TI I. XVIII. H'.S It IT. 



Differs from /.'. ///////i. which it resembles more closely than any other known, 

 in )>eing smaller (12 to 15 mm. in diameter), in having a proportionally smaller 

 umbilicus, and in its surface markings. DM the upper -i-le. which is also a little 

 more depressed, the lines of growth are very faint, while the peripheral edge turn- 

 rather di-tiiictly upward. n the lower side the lines of growth are likewise 

 obscure except in the peripheral half of the la-t whorl, where they appear as rather 

 coarse undulations of which the I.e-t -p.-cimen has about seven in 5 mm. The 

 course of the lines on this side, which of course corre-pond- with the outline of the 

 lower lip, is more convex anteriorly than in /,'. /,//,iV/'//,/. (Compare tig-. 1C, and 18 

 on plate I.XVIUi. /.' '/ntirii/nf,i is a larger shell, has a higher spire and deeper 



