« BOOK OF SPECIES. 



somewhat furrowed from the striae of growth ; 

 dirty yellow ; inside brilliant white. W. 38. 84. 



EM ARC INULA. 



Conical^ shield-shaped ; vertex inclined to one side ; 



internal cavity simple ; dorsal margin fissured. 



E. FissuRA. Oval, convexly conic, cancel- 

 lated by small longitudinal ribs and transverse 

 striae, pellucid, whitish ; summit curved ; margin 

 crenulated; small. B. W. 37- 86. 



E. DEPRESSA (Blainville) . White, limpet- 

 shaped, ovate-oblong, laterally depressed; sum- 

 mit salient, pointed, and inclined, from which 

 proceed nine principal ribs, and smaller ones 

 intervening, which are met at right angles by 

 transverse striae, and at their junction appears a 

 tubercle ; greenish within -, small. 



E. EMARGiNATA. Ovatc, conic, patelliform, 

 and ribbed, white or greenish white, channelled 

 within anteriorly ; margin sub-emarginated ; eight 

 of the ribs more prominent than the rest; sum- 

 mit pointed and sub-central. | . . . i. 



