DALL: MOLLUSCA AND BRACHIOPODA. 3387 
of the pillar; there is a heavy callus on the body which is attenuated at the side 
of the umbilicus, while in so/wéws the callus is comparatively thin on the body and 
has a broad reflection nearly covering the narrow umbilicus. The shell has about 
four whorls, and an adult measures: alt. of shell, 22.0; of last whorl, 19.5; of 
aperture, 14.0; max. diam. 18.0 mm. 
Stations 2778 and 2779, Magellan Strait, in 61 to 77 fathoms, ooze, bottom 
temperature 47° F. U.S. N. Mus. 97,126 and 106,873. Also at Laredo Bay 
in the strait. 
After careful and repeated comparisons I cannot make this shell agree with any 
of those illustrated in Strebel’s valuable account of the shells of this vicinity, and 
it is certainly not identical with the shell figured by Gould as his Natica soluta. 
Polinices (Huspira) constrictus Datt, n. sp. 
Shell solid, smooth except for lines of growth, polished white or grayish, hav- 
ing five and a half whorls; apex rather pointed, slightly elevated, with a closely 
appressed suture, immediately in front of which the whorl is slightly but distinctly 
constricted, beyond this the whorl is fully and evenly rounded; the edge of the 
whorl at the suture is vertically striated by the more emphatic incremental lines, 
but these striae do not pass in front of the constriction; under a good lens the 
entire surface is seen to be microscopically closely evenly striated ; aperture ovate, 
outer lip thin and sharp, body with a thick callus, proximal end of the pillar 
heavily callous, but the callus, though partially overflowing the umbilicus, has no 
umbilical lobe or sulcus such as is seen in Neverita ; anterior part of the pillar 
wide, depressed; umbilicus narrow, funicular, with a spiral impressed ascending 
line anteriorly. Alt. of shell, 20.0; of last whorl, 18.0; of aperture, 13.0; max. 
diam. 17.0 mm. 
U. S. S. “ Albatross,” station 2780, Magellan Strait, in 369 fathoms, mud, bot- 
tom temperature 47°.0 F. U.S. N. Mus. 97,065. 
An elegant little species having somewhat the aspect of a small Neverita. 
Polinices (Huspira) litorinus Datt, n. sp. 
Shell small, solid, depressed, with almost exactly the form of Lcttorina palliata 
Say, milk-white with a pale straw-colored periostracum, and about three and a 
half whorls; surface smooth, except for faint incremental and occasional obsolete 
spiral lines, not polished; suture distinct, almost appressed; whorls rounded ; 
aperture ample, ovate; outer lip sharp, body with a heavy white callus, which 
extends downward and almost entirely fills the umbilicus, leaving only a minute 
fissure open; the umbilical region but slightly indented ; operculum paucispiral, 
light brown, horny, of about two whorls, the nucleus in the anterior fourth of its 
total length. Alt. of shell, 9; of last whorl, 8.5; of aperture, 7.5; max. diam. 
8.5 mm. 
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