2 
ing unlike thè forms which wonld be expected in so high a latitude, and as an 
carnest of what may be looked Por in future explorations. 
Cancellarla [Trigonostomn) unalashkensU, n. s. PI. II, fig. 2. 
Shell slender, acute, of six whorls, with a minute, smooth, white nucleus and 
solid texture. Color whitish with traces of a nut-brown epiderinis. Scuipture 
of strong revolving ribs, of which thè posterior three are crossed by rather strong 
transverse riblets which rise into beaded nodules on thè intersections. The 
whorls are furrited by thè proniinence of thè posterior revolving rib, between 
which and thè suture thè transverse riblets are oblique and rather strong. 'l’hrce 
of thè revolving ridges are apparent on thè upper whorls and seven on thè last 
whorl. Aperture about two-fifths thè w’hole length, white, with a pink throat, 
and thè outward lip somewhat thickened and internally grooved, corresponding 
with thè external ridges, which are also apparent on thè inner lip. Canal short, 
straight, shallow and rather narrow. 'J’wo or three plicae on thè coluniella. 
Animai w'hitish with no operculum Lon.. 0.7.5 in.; lat.. 0.3 in.’; dell. 35o. 
Habitat. — 30 to 60 fathonis stony mud in Captain’s Harbor, Unalashka, Al- 
eutian Islands ; three living specimens. Gancellaria modesta, Cpr., was also 
found bere, but not in thè deeper water. 
Cancellarla [Trigonostoma) circumcincta, n. s. PI. II, fig. 2. 
Shell similar in form to thè last, with six whorls, nucleus minute and nearly 
smooth ; thin and delicate ; whorls sculptured with strong revolving ridges, gen- 
erally subequal, but with a few more slender intercalary threads ; turns gently 
rounded with a very slight tendency to tabulation toward thè posterior third of 
thè whorl ; crossed by very faint transverse irregular rililets, which are niost 
evident on thè apical whorls and evanescent on thè body whorl, and show a 
slight tendency to granulation at thè intersections only on thè first two or three 
whorls. Color rose pink, strongest on thè ridges. Outer lip thin, delicate, thè 
scuipture of thè exterior showing through ; inner lip not thickened ; columella 
white with two or three very faint plicte. Animai slate-color. Canal short but 
deeper than in thè last spccies. Lon., 0.82 in.; lat., 0.37 in.; defi., 40°. 
Habitat. — Popoff Strait, Shumagin Islands, in ten fathoms stony mud about 
thè reefs. 
Srpho Hallii, n. s. PI. II, fig. 3. 
Shell fusiform, solid and heavy, of five and a half whorls, thè last mudi thè 
largest; suture subcanaliculate, not deep, but very distinct; whorls moderately 
convex, somewhat appressed toward thè suture. Canal rather long, ranch re- 
curved ; aperture elongate, acute behind ; inner lip much thickened, white ; 
outer lip hardly thickened, posteriorly waved. Shell covered with a yellow- 
brown epidermis, with very faint revolving stri®, Crossing thè slightly evident 
waved lines of growth. 
Lon. 1.7 in.; lat. 0.8 in.; lon. apert. 0.95 in.; defl. 45°. 
Habitat : Sanborn Harbor, Nagai ; three dead spbcimens, with Paguri, 
found by Capt. W. G. Hall, sailing master of thè U. S. C. S. Schr. Humboldt, 
to whom I am indebted for many valuable additions to our collections. 
This species is smaller and more solid than most of thè genus, and does not 
