CLASS GASTROPODA 
155 
Cancellaria unalaskensis Dali, 1873 
Proceedings of the California Academy of Sciences, 5 :58; PL 2, fig. 1. 
Shell slender, acute, of six whorls, with a minute, smooth, white 
nucleus and solid texture. Color whitish with traces of a nut-brown epi¬ 
dermis. Sculpture of strong revolving ribs, of which the posterior three 
are crossed by rather strong transverse riblets which rise into beaded nod¬ 
ules on the intersections. The whorls are turreted by the prominence 
of the posterior revolving rib, between which and the suture the transverse 
riblets are oblique and rather strong. Three of the revolving ridges are 
apparent on the upper whorls and seven on the last whorl. Aperture 
about two-fifths the whole length, white, with a pink throat, and the out¬ 
ward lip somewhat thickened and internally grooved, corresponding with 
the external ridges, which are also apparent on the inner lip. Canal short, 
straight, shallow and rather narrow. Two or three plicae on the columella. 
Long., 0.75; lat., 0.3 in. (Dali.) 
Type in United States National Museum. Type locality, 30-60 fathoms 
in Captain's Harbor, Unalaska, Aleutian Islands. 
Range. Unaslaska, Alaska, to Cape Blanco, Oregon. 
Cancellaria circumcincta Dali, 1873 
Proceedings of the California Academy of Sciences, 5:59; PI. 2, fig. 2. 
Shell similar in form to the last, with six whorls, nucleus minute and 
nearly smooth; thin and delicate; whorls sculptured with strong revolving 
ridges, generally subequal, but with a few more slender intercalary threads; 
turns gently rounded with a very slight tendency to tabulation toward 
the posterior third of the whorl; crossed by very faint transverse irregular 
riblets, which are most evident on the apical whorls and evanescent on 
the body whorl, and show a slight tendency to granulation at the inter¬ 
sections only on the first tw'O or three whorls. Color rose-pink, strongest 
on the ridges. Outer lip thin, delicate, the sculpture of the exterior show¬ 
ing through; inner lip not thickened; columella white, with two or three 
very faint plicae. Canal short but deeper than in the last species. Long., 
.82; lat., .37 in. (Dali.) 
Type in United States National Museum. Type locality, Popoff 
Strait, Shumagin Islands. 
Range. Unalaska to Point Etches, Alaska. 
Genus ADMETE Kroyer, 1842 
Shell oval, thin, diaphanous, covered by a thin epidermis; spire sharp; 
last whorl ventricose; aperture oval, feebly channeled in front; colum- 
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