142 
VICTORIA MEMORIAL MUSEUM, BULLETIN NO. I 
Sutures strongly constricted. Periphery of the last whorl well- 
rounded. Base short, well-rounded, marked by the very feeble 
continuations of the axial ribs and six strongly incised spiral 
lines which become successively closer-spaced from the peri- 
phery to the umbilical area. The space enclosed between the 
last two spiral lines shows a very slender incised thread. Aper- 
tures moderately large; posterior angle obtuse; outer lip 
(fractured); columella strongly curved, slightly revolute and 
somewhat reflected over the base. 
The type which is in the collection of the Dominion Geo- 
logical Survey was dredged by Mr. Young in 19 fathoms at 
Barrington Passage in Nova Scotia. It has nine post-nuclear 
whorls and measures: length 6*1 mm., diameter 1*8 mm. 
Odostomia (Evalea) cassandra, new species. 
Plate X, fig. 2. 
Shell small, ovate, very thin, semi-transparent, light yellow. 
Nuclear whorls deeply immersed in the first of the succeeding 
turns. Post-nuclear whorls very strongly, tabulately shouldered 
at the summit, moderately rounded, marked by fine incre- 
mental lines, and numerous exceedingly closely spaced, very 
fine, spiral striations. Sutures strongly constricted. Periphery 
of the last whorl well-rounded. Base rather long, well-rounded. 
Aperture very large, broadly oval; posterior angle decidedly 
obtuse; outer lip very thin; inner lip very slender, very oblique, 
somewhat sinuous, strongly curved, and slightly reflected, pro- 
vided with a weak fold some little distance anterior to its in- 
sertion. 
Two specimens, cotypes, of this species were dredged at 
Skidegate. One of these has four post-nuclear whorls and mea- 
sures: length 2*5 mm., diameter 1*3 mm. One is in the collec- 
tion of the Dominion Geological Survey; the other is Cat. No. 
220120 in the U. S. N. M, 
