232 MOLLUSCA. 
close-set, angular longitudinal ridges, to the number of twenty on the 
last whorl, and also by deep-cut revolving strie between the ridges, 
most conspicuous near the beak as the ridges begin to disappear. 
Aperture oval, prolonged into a moderate-sized canal; lip simple, 
bordered by the last angular ridge, sub-arcuate in the middle; colu- 
mella white, with a purplish callus extending from it upon the body 
of the shell. Interior milk white, with a purplish clouding near the 
hips s4(aesc. 
Length three-fourths of an inch ; breadth three-eighths of an inch. 
Dredged in Orange Harbour from fifteen fathoms. 
The prominent trigonal ribs, cut by the deep, somewhat distant 
revolving lines, with its slender rostrum, are characteristic of this 
species. It resembles Buccinum cancellarioides, Reeve. 
Figure 282, shell, with the animal, as in motion; and 282 a, loco- 
motive disk, enlarged ; 282 4, shell, natural size. 
The six preceding species belong to a group which is peculiar to 
the southern extremity of America. They have a simple leaden or 
slaty colour, a short buccinoid form, but with a canal like Fusus, 
instead of a siphonal notch; the surface is sometimes decussated, but 
is oftener smooth or with occasional sharp, longitudinal lamelle, and 
in some species these lamellw are very numerous, so as to appear like 
Murex. The animal is small, sluggish, and colourless or pale yellow, 
with a delicate extensile proboscis and short conical tentacles, having 
the eyes about the middle of their length. The operculum is like 
Fusus. Somewhat similar forms are found in corresponding northern 
latitudes, as in Fusus Bamffius, F’. ventricosus, lamellosus, &c. 
Fusus inctsus (Gould). 
Testa elongato-ovata, livido-cinerea, striis profundis volventibus satura- 
tioribus incisa: spira conica, anfractibus septem convexis, apicalibus 
undulatis, ult’mo trientes duos longitudints teste; rostro brevi, vix 
recurvo: apertura dimidiam longitudinis testa adequante, angusta, 
subovalis ; labro arcuato, acuto, crenulato ; columella rectiuscula, levi, 
subcontorta, purpurascente: faux livido-fusca, sulcata. 
