1889.] NATURAL SCIENCES OF PHILADELPHIA. 801 



berryi (Stevens) but according to Meek and Worthen it does not 

 exhibit the columellar fold so characteristic of that genus. 



Bulimorpha elongata (Hall). 



Bulimella elongata Hall, 1858. Trans. Albany Inst., vol. IV, p. 

 30; Polyphemopsis elongata Meek and Worthen (non Portlock), 

 1866. Geol. Sur. Illinois, vol. II, p. 373; Polyphemopsis tereti- 

 formis Hall, 1877, Miller's Cat. Pake. Foss., p. 245 ; Bulimorpha 

 elongata Whitfield, 1882. Bui. Am. Mus. Nat. Hist., vol. I, p. 75. 

 Warsaw Limestone. 



Bulimorpha inornata (Meek Mini Worthen . 



Loxonema inornalum M. and \\\, 1860. Proc. Acad. Nat. Sci. 

 Phila., p. 465 ; Polyphemopsis inornata M. and W., 1866. Geol. 

 Sur. Illinois, vol. II, p. 374. Upper Coal Measures. 



In specimens of this species recently examined the inner lip 

 appears to be quite variable, sometimes being very pronounced, 

 sometimes scarcely defined. 



Polyphemopsis keokuk Worthen, 1884. Bui. 2, Illinois State Cab. 

 Nat. Hist., p. 9. Keokuk Limestone. 



Described from casts in Limestone, too imperfect to deserve 

 recognition. Its true generic characters cannot therefore be made 

 out. 



Polyphemopsis louisvilla Hall and Whitfield, 1872. 23 Keg. 

 Rep. N. Y. State Cab., pi. xii. tigs. 1 and 2, desc. 24 Rep., p. 193. 

 P. knappi H. and W., in some copies of advance sheets of 23d report. 

 Upper Heldberberg. 



In the absence of an authentic specimen ist generic position can only 

 be surmised. It bears a close resemblance in some particulars to 

 Bulimorpha, but it may belong to another group along with several 

 of the so-called Macrochili, distinguished from the type by the 

 alleged absence of the fold on the columella. 

 Bulimorpha minuta (Stevens). 



Loxonema minuta Stevens, 1858. Am. Jour. Sci., (2) vol. XXV, 

 p. 260; Actceonina minuta Meek and Worthen, 1873. Geol. Sur. 

 Illinois, vol. V, p. 594; Acteeonina minuta Keyes, 1888. Proc. 

 Acad. Nat. Sci. Phila., p. 240. Lower Coal Measures. 



If the recent observations upon this species from Des Moines are 

 correct this form isatrue Bulimorpha having its closest affinities with 

 B. eanalieulata (Hall). In most specimens examined the inner lip 

 is well developed for half the length of the aperture, but appears to 

 be separated from the outer labium by a distinct notch. 



