30 PHYSA CONCOLOR. 



they may be from the latter country. In either 

 case, the species appears to occur in too great 

 abundance to allow us to suppose that it is now 

 characterized for the first time. Figure 13 is 

 from a specimen in Dr. Jay's collection, and 

 may be a distinct species. 



PHYSA CONCOLOR, Hold. 



Plate 2.— Fig. 10. 



Testa ovata; spira producta, apice acuto: anfractibus 4 

 convexis. 



DESCRIPTION. 



Shell oval; spire produced, with the apex 

 pointed: aperture oval, narrow, with the colu- 

 mellar fold distinct. Color honey-yellow. 



OBSERVATIONS. 



Characterized from a single specimen brought 

 from Oregon by Mr. Nuttall. 



