GENUS BUCCINUM. 59 
right lip. Specimens have been found in the South Seas, on 
the coasts of Chili, nearly seven inches in length. 
59. BUCCINUM UNICOLORUM, Nosis. The Single-colored 
Bucecinum. 
(Collect. Mass.) 
Pl. XIX, fig. 69. 
B. testa ovato-conica, levi, cinereo-albidd, unicolorata; anfractibus su- 
perné plicatis, ultimo paulo majore; spird basi sulcatd; apertura ovata, 
alba, intus fulva; labro dextro crasso, infimé arcuato, marginato, intis 
striato. 
Shell ovate, conical, smooth, of a uniform ashy white color ; 
spire composed of eight whirls ; the upper ones slightly plait- 
ed, the lowest pretty large, marked with more or less straight, 
longitudinal lines, approximate, and of a color a little deeper 
and reddish; base ornamented with six or seven furrows ; 
aperture ovate, white, fawn-colored within; right lip thick, 
arcuated towards the base, elevated exteriorly into a thick, very 
prominent margin ; within striated throughout its whole length ; 
left lip thick, and partially covering the columella, which is 
adorned with guttules one half of its length ; the first of these 
guttules, which is uppermost, is much more marked than the 
others. At the base of the columella is found a very promi- 
nent fold, terminated by a guttule formed like a flattened point. 
Length 13 inches. Width 8 lines. 
Inhabits 
This shell, at first sight, would seem to differ essentially from 
the B. olivaceum ; its form is more elongated, it has not the 
strie upon the whirls of the spire, and, finally, its whitish color 
appears particularly to distinguish it from the last. These con- 
siderations have caused us to regard it as a different species, 
and yet we are not confident that new observations may not lead 
to certain gradations which will unite it to the B. olivaceum. 
