1890.] NATURAL SCIENCES OF PHILADELPHIA. 47 



edge scalloped by the spiral lirre ; inner lip arcuate, smooth ; canal 

 lougish, open, reflexed ; umbilicus none, but there is a furrow in its 

 place, bounded by a fasciole ; aperture purple within ; apex knob- 

 shaped, smooth. 



Alt. 32, diam. 15 mm. Aperture (including canal) alt. 6, diam. 

 6 mm. 



It is separated from cinereus by its greater proportional width, its 

 stronger ribs and spiral line and more scabrous texture. It is at 

 once separated from tampaensis by its sculpture ; that of tampaensis 

 being latticed by the intersection of the longitudinal and spiral lines ; 

 there are other differences Avhich will at once separate it from that 

 species. 



Mr. Tryon, in his excellent Manual of Conchology, seems to have 

 overlooked this species as it is not given in either text or index. 



Specimens have been collected at Cedar Keys, Florida, by Mr. H. 

 Hemphill, and I uudei'stand from collectors that it has been found 

 elsewhere on the west coast. 



