BETTIUM, 



i;. i.i.i I.MIM. \Vatson. IM. :jn, fiir. 15. 



\\'itli about seventeen longitudinal ribs, separated by ejual 

 grooves, abruptly terminatinir about half-way on the rounded body 

 whorl. >jiiral sculpture minute and taint, most prominent near the 

 -ut mv ; translucent, .irlossy white. Len.irth, 'J'.'J mill. 



Trixtan da Cunha Is. 



AQUjini, Pfeiti;..-. IM. 2'-. fi.LT. \l 



Whorl- with three stron r spiral ciniruhe completely dominating 

 the distant longitudinal costulations ; rather thin; yellowish white 

 with a tew minute invirular fulvous spots, under a light yellowish 

 epidermis. Length, ~> mill. 



South Georgia /.</. 

 li. I i:i M:IN \ ITM, Pease. PI. 30, fig. 9. 



Whorl- turn-ted, rounded, with three strong spiral keels, longi- 

 tudinally plaited, suture well impressed, light yellowish brown. 



Length. 7'") mill. 



P. i II:I:ITI:I.I.II-.I:MIS, Angas. 'PI. 30, fig. 13. 



Kather thin, finely spirally ridged, interstices very minutely lon- 

 gitudinally striated : whorls 10, the last keeled below, with smooth, 

 >omewhat eoneave base ; lirht yellowish brown, inclining to reddish 

 purple on the upper whorls. Length, 8 mill. 



Port Jackson, Australia. 



II. ri.i:ri HI.UM. Tryon. PI. 30, fig. 17. 



Pro\\ni>h, wliorls !-!<), with four spiral rows of granules, longi- 

 tudinally suhpliratr. base with five additional spiral riblets, suture 

 de.-p. Lni^th. li mill. 



Japan. 



he-rribed by hunker as I!. //>/>//////, preoeeupied by Gould. 



I'.. MI i M I.IM. Could. PI. lid, fi-. 10. 



Whorl- MP.n-lv longitudinally ribbed, crossed by three .-piral 

 ridges. fonninL r three KOOM of' lai'L r e tubercles, interstice.- deeply 

 pitted, suture deep ; hrowni.-h. the rid ires of the last whorl spotted 

 \\ith '-hr-tnut. Leii-th, (I mill. 



( 'hi i 

 P.. 1. \\vi.i v \\i M. Cro.sse. PI. :;n, li-s. :,, !4, 96. 



Whorl- flatly convex, rounded at the -mure, spirally distantly 

 grooved, blui.-h. white banded. Length, \O mill. 



Auxtnili'i. X. 



