Vitrmella interrupta. iLdams. 



'\''. t, globosa, subconica, alba, siibtraiisparente : su.lcis elevatis tri- 

 bus supra, et sulcis minoribiis qviinque vel sex subti =;, spiralibus in- 

 sculpta ; striis transvorsis candklis subdistantibus a bulcis interruptis 

 ornata : apice perobtusa : spini elevala, convexa : anfractibus qua- 

 tiior, convexi?, sutura Laiul valde imptressa ; anf. ul;:mo ruagno, reg- 

 ulariter rotundato, subtus lale et profundc indentato. 



Depressed globose conic : 



wliite, subtransparent in the last whorl : 



with three rather large more or less elevate .1 spiral grooves 

 above, and five or six of less size beneath ; \rith somewhat 

 distant opaque while transverse strife, which arc interrupted by 

 the spiral grooves : 



apex very obtuse : 



spire witli very convex outlines : 



whorls four, quite convex, witii a moderately impressed su- 

 ture ; last whorl rather large, rapidly increasing, well rounded : 



aperture scarcely modified by the penult whorl : 



umbilical region widely and deeply indented. 



Mean divergence about 100° ; length of spire .015 incii ; total 

 length .0.35 inch ; greatest breadth .045 inclr; least breadth .033 

 inch. 



