150 BUCCINID.&. 
Shell oval, thin, ventricose; spire very short; body-volution 
large, not produced below; aperture large, terminating below in 
a rounded sinus ; outer lip thin and simple; inner lip very thin, 
smooth, and closely and very broadly folded upon the imper- 
forate umbilical region and body-volution above, so as to form, 
with a low revolving umbilical ridge, a kind of profoundly arcu- 
ate, strongly spiral, false columella; surface with more or less 
distinct revolving lines and furrows. 
Meek is inclined to believe that Bullia ampullacea is a living 
example of his genus; if so, Volutharpa, Fischer, will have pri- 
ority over Pseudobuccinum. 
OpontTosasis, Meek. 
Distr.—O. ventricosa, Meek (li, 68). Cretaceous; Dakotah. 
Shell buccinoid-fusiform ; spire more or less produced ; body- 
volution ventricose, and separated below from the short narrow 
beak, by a sharply-defined, narrow, revolving sulcus, that termi- 
nates below at the connection of the outer lip with the canal, in 
a small tooth-like projection; outer lip thin, smooth within, and 
nearly straight in outline; inner lip not thickened, but well- 
defined ; columella a little twisted, slightly flattened, and bearing 
two oblique plaits below, the lower one of which is formed by 
the raised lower edge of the obliquely truncated columella, and 
the other, which is very obscure, or perhaps sometimes obsolete, 
placed a little above the same; surface ornamented by vertical 
folds and revolving lines and furrows. 
This genus, referred doubtfully to the Buccinide by Meek, 
seems to unite characters of several different groups; the shell 
is Buccinoid in form and sculpture, but the fold and tooth 
remind one of Fasciolariz, whilst the truncate columella recalls 
the Nasse. 
EcTRACHELIZA, Gabb. 
Distr.—E. truncata, Gabb (li, 69). Miocene; San Domingo, 
Wt. 
Shell acuminately oblong, spire elevated (always truncated 
in the only species known). Surface compressed near the suture. 
Inner lip incrusted ; columella sinuous, short ; outer lip produced 
in advance. 
This genus seems to be allied in many of its characters to 
Cominella and Truncaria. Like them, it is compressed adjoining 
the suture. It shows no trace of umbilicus, as seen in most of 
the Buccinide, but its most distinctive character is in its obliquely 
subtruncated columella, which does not reach to the anterior end 
of the shell. 
BRACHYSPHINGUS, Gabb. 
Distr.— B. liratus, Gabb (li, 70). Cretaceous ; California. 
