338 



strongest of the revolving ridges occur in the umbilical region (comp. 

 Oriostoma glohosum as figured by Lindstrom). The features mentioned 

 are not all of generic scope, the last especially indicating specific allian- 

 ces.'' 



PoLEUMiXA MACKOLINBATA (Whitfield). 



Euomphnlus macroUneatus (Whitfield) Whiteaves. 1884. This volume, pt. I, p. 20, pi. 



3, fig. 6. 

 Polylrapis macroUneatus (Whitfield) Whiteaves.. 1895. Idem, pt. II, p. 91. 



But Clarke and Ruedemann think that the Canadian specimens that 

 have been identified with this species can " hardly with safety be referred 

 to the large, very coarsely ridged shell which Whitfield describes as 

 Euomphalus macroUneatus, from the dolomites at Manitowoc, Wiscon- 

 sin." 



POLECMITA CRENULATA (Whitcaves). 



Straparollus crcnulatus, Whiteaves 1884. This volume, pt. I. p. 21, pi. 3, 



figs. 8, 8 aand 8 hi 



Polytropis crcnulatus, Whiteaves 1895. Idem, pt. II, p. 91. 



Foleumita creniilata, Clarke and Ruedemann. ..1903. N. York St. Mus., Mem. 5, p. 



64, pi. 9, figs. 9, 11, 16-24. 



PoLEDMiTA DuRHAMENSis, Whiteaves. 



Polytropis Durhamcnsis, Whiteaves. . .1895. This volume, pt. II, p. 91, pi. 14, figs. 



1 and 2. 



PoLEUMiTA PARVULA, Whiteaves. 

 Polytropis parvulus, Whiteaves 1895. Idem, p. 92, pi. 13, figs. 10 and 10 o. 



CoDONOCHiLUS STRIATUS, Whiteaves. 

 Pycnomphalus solarioides (Hall.) 



LOXONEMA BOYDII, Hall. 



HoLOPEA Harmonia, Billings. 

 HoLOPEA GuELPHENsis, Billings. 

 Holopea Gbacia, Billings. 

 HoLOPEA (J) oaciDENTALis, Nicholson. 

 SuBULiTES COMPACTUS, Whiteaves. 



Cyrtospira ventricosa (Hall). 



Suhulitei ventricosus (Hall) Whiteaves 1895. This volume, pt. II, p. 96. 



Cyrtospira ventricosa, Vhich a,iid SooHeld 1897. Geol. and Nat. Hist. Surv. Minn., 



Final Eep., vol. Ill, pt. II, p. 1073. 



