ghioi::j Z^TUGIM n. s-n.' 



Description .- Shell snBll, moderately inflated, decidedly 

 inecaiilateral, eloi'i^^ate-ovate ; posterior ma r^-"''. lor;-'', alnost strair^ht, 



slopin „'-ii'-"ly, anterior end roimding into tuc- ; ij.:'.L;e out 



slightlj' curved in its median portion and at the posterior end 

 turning up abruptly, meeting the T)Osterior marrrin at a Ghez"p 

 angle; tlie Incised line "boiindirjg the linnile fee'oly i;:'pre:jsed; 

 escutcheon long and hroad for the size of the shell, the proximal 

 half of its msrp-in adjacent to the liti-ar-iont slip-htly raised; in 

 front of the suorounded cerina, li itii^^'- the escutcheon, the sur- 

 face of the shell slishtly depressed t o.v ard the ventral margin, 

 'hut not enou!^h to affect the 'T?rgin; external s^'irfoco sculptured 

 'Afith a moderate numher of concentr' ' '.os v.ltn prominent, round- 

 ed radials crossing the interspaces; near the luaiule the edge of 

 the concentric rihs turned t or/ard the ven-'-ral mergin and vreal'l-:: 

 crenulatG"^, out over the remainder ' '"he aiiterior tv;o-vhira^ of 

 the shell the e dp^e tiirned •' 1 the umbo, thickened and the 



crenulati o::s feehle or ahsent; on the -posterior third, the e'lge 

 is again refle:-:e";, lengthened and c renulato". ; weal: continuations 

 of the rihs present on the lunula; escu.toheon striate' hy the fine, 

 concentric li""rn o'-'nr.r-i"-- th? radial; ; ' " ~s noi':ial, the right 

 anterior cardinal" " ' the posterior comxjressecl. 



