FUSID. 129 
Shell short fusiform, spire and canal moderate, body-whorl 
rather large, shouldered and tuberculate, aperture channeled 
behind, outer lip dentate within. 
Professor Meek (Pal. Hayden’s Survey., ix, 344) states that 
the fossil species described by Conrad, are not congeneric with 
the type, the recent Fusus afer, Lam., and he refers them to 
Conrad’s genus Pyrifusus, one of the forms of Neptuniine. 
CLAVELLA, Swainson. 
Syn.—Clavellithes, Swn. Cyrtulus, Hinds. Triumphis, Gray. 
Peistocheilus, Meek. 
Distr.—C. serotina, Has. (xlvii, 83). Marquesas Is. Fossil. 
Cretaceous ; Missouri. 
Shell solid, thick, subfusiform ; spire acuminate; last whorl 
suddenly contracted in front, thickened and rounded next the 
suture; aperture narrow, canal long and straight; columella 
excavated in the middle; outer lip simple. Operculum ovate ; 
nucleus apical. Dentition, unknown. 
Only one recent species can be referred properly to this fossil 
genus, which is the C. serotina, the type of Hinds’ genus Cyr- 
tulus. The three other recent species referred to it by H. and 
A. Adams are members of other genera: C. avellana, Reeve, is 
a Cronia. C. distorta, Reeve, belongs to the Pisaniine. (. sub- 
rostrata, Gray, belongs to the Melongeniinz, 
Peistocheilus, Meek, described as a subgenus of Fasciolaria, 
appears to be identical with Clavella, as Meek himself subse. 
quently suspected. The columellar plaits are nearly obsolete, 
situated so far within the aperture as to be barely visible and in 
many specimens are not seen at all. C. Scarboroughi, Meek and 
Hayden (xlviii, 1,2). Clavella itself occasionally shows these 
adventitious and inconspicuous plaits. The shell is so decidedly 
fusiform that I place it in the Fusine in preference to the Fas- 
ciolariine despite these folds. 
Buccrnorusts, Conrad. 
Syn.—Boreofusus, Sars. Troschelia, Morch, 1876. 
Distr.—2 sp. North Sea, Spitzbergen. B. Berniciensis, King 
(xlvii, 84). Fossil. Miocene; U.S. 
Shell ventricose, spirally sculptured ; epidermis pilose ; spire 
produced ; canal moderate in length; columella smooth. The 
type of this genus is a Miocene fossil, B. parilis, Conr. 
The dentition, only, separates this from Sipho, several species 
of which might be regarded as either indentical, or varieties at 
most. 
Jeffreys thus describes the animal: Body white or cream-color, 
with a slight tinge of flesh-color; mantle sometimes edged with 
brown ; pallial tube extensile, occasionally protruded beyond the 
