BORSONIA. 2297 
Genus BORSONIA, Bellardi, 1846. 
In the fossil Borsonia prima, the shell is fusiform, the lip not 
varicose, the columella with a single plait, high up; but in some 
fossil species there are indifferently one or two plaits, so that 
Cordiera (= Scobinella) is generally considered synonymous. 
The following recent species, referred to Borsonia, are now 
placed here with some hesitation ; the plications being usually 
more numerous, and the shells otherwise resembling that section 
of Mangilia for which the name Glyphostoma has been proposed. 
Unfortunately, the operculum of none of the species has been 
noticed ; and I really doubt its existence in any of them. My 
conviction is that these forms will all be found to be Glypho- 
stome, and that the diagnosis of that group will need to be 
enlarged to include species having several as well as many 
columellar plications. 
B. cRASSICOSTATA, Pease. PI. 34, fig. 94. 
Shell fusiform, shining, longitudinally coarsely ribbed, crossed 
by revolving raised striz ; whorls rounded, with well-impressed 
sutures; aperture narrow; outer lip denticulated within; canal 
short, slightly recurved, light vellow or pink. Length, 7 mill. 
Sandwich Islands, Paumotus. 
B. BrrAsciIatTA, Pease. 
Shell fusiform, shining, longitudinally coarsely ribbed ; crossed 
by coarse raised striz; whorls rounded at the sutures; outer 
lip thick, incurved, serrated on the edges at the termination of 
the transverse striz; canal short and slightly recurved; color 
white ; two light brown bands on each whorl. 
Sandwich Islands. 
Not figured, and I have no specimens; the description may 
be compared with B. nigrocincta, Montr. 
B. LuTEA, Pease. 
Shell fusiform, solid, shining; whorls convex, angulated at 
the sutures, longitudinally regularly and closely ribbed, crossed 
by regular transverse ridges ; aperture narrow ; outer lip thick, 
denticulated within; canal produced and recurved; light 
yellowish brown. 
Sandwich Islands. 
Unfigured. 
