ILL USTRA TlOm OF A M ERICA X SHELLS— DA LL. 5 1 9 
BUCCINUM PLECTRUM Stimpson. 
Plate XXX VI I. li^^ 5. 
Buccinum pleclrum Stimpson, Rev. North. Bucc, Can. Nat. for 1865, p. 374. — 
KoBELT, Conch. Cab. Buccinum, p. 83, 1883, pi. xci, fig. 2. 
Bering Strait, in 25 to 30 fathom.s, Stimpson; shores of Bering Sea 
and the Aleutian Islands, Dall. U.S.N.M., 34232. 
The specimen figured by Kobelt being imperfect and not very charac- 
teristic, 1 have represented a fine specimen from Kadiak Island, Alaska, 
no figure l)eing accessible in any American publication. 
BUCCINUM CASTANEUM Dall. 
Plate XXXVII, figs. 7, 9. 
Buccinum castaneum D.\ll, Proc. Cal. Acad. Sci., VII, 1877, p. 3. — Kobei.t, Cont-h. 
Cab. Buccirnuii, p. 84, 1883, pi. xci, fig. 3. 
Shumagin Islands. Alaska, in 20 fathoms, Dall (normal form); west- 
ern Aleutian Islands ii\5 fathoms, Dall (vai\ tricar!natum). U.S.N.M., 
108973, 108974. 
I give figures of the two types of this species already referred to 
under B. angulosuin. ■ 
This species has a translucent brown outer coat with fine uniform 
spiral striation. 
BUCCINUM TENELLUM Dall. 
Plate XXXIX, fig. 9. 
Buccinum tenellum Dall, Conch. Cab. neue ausg. Buccinum, 1883, p. 88, pi. 
XCI, fig. 8. 
Cape Etolin, north end of Nunivak Island, Bering Sea, Dall. 
U.S.N.M., 108975. 
Shell small, solid, with about six whorls, a rather acute spire, very 
distinct suture, below which the whorl is pinched or puckered into 
short inconspicuous ribs; surface brownish yellow with a spiral sculp- 
ture of small flat riblets separated by incised lines, the riblets them- 
selves finely uniforml}' spirall}" striated; canal short, recurved; 
siphonal fasciole strong, pillar lip callous, the outer lip expanded, sinu- 
ous, not much thickened. Alt., 22.25 mm. 
Though not exhibiting an}'^ veiy striking features, this little shell 
does not fit in with any of the other species of the region well enough 
to permit it to be united specifically. The figure in the Conchylien 
Cabinet was not accompanied b}^ a diagnosis, which I now provide. 
