RETUSA. 209 



This species is very like Cylickna alba (Brown), but is squarer 

 both above and below, the obliquity of the line of the top is exactly 

 the opposite of that Oylichna alba, where from the outer lip rising 

 above the top of the shell, the greatest height is at the mouth ; 

 while in Utriculus leucus, the top is highest on the side away from 

 the mouth. Utriculus vortex Dall, appears to present several points 

 of resemblance ; but that species seems to taper much more toward 

 the tip, to be differently and much more strongly sculptured, to have 

 no pillar tooth, and to be very much broader in proportion to 

 height. Alt. *3 in., diam. 0'17 in. The Tornatina eximia Baird has 

 a more perfectly cylindrical form, a higher spire, and a much wider 

 mouth 



R. TORNATA Watson. PI. 21, fig. 3. 



Shell small, cylindrically oblong, a little tumid in front, slightly 

 narrowed backwards, rounded at the shoulder, longitudinally and 

 spirally striate, with a flat top, a small papillary apex and straight 

 club-shaped mouth. Sculpture : Longitudinals there are many 

 fine, rounded, feeble lines of growth. Spirals there are many very 

 faint minute superficial spiral lines which owe somewhat of distinct- 

 ness to the color, and to the fact that at somewhat regular intervals 

 there occurs one a little stronger than the rest. Color transparent 

 white, irregularly banded with unequal spiral milky stripes, which 

 are obsolete in many specimens. Mouth club-shaped, the full length 

 of the shell, long and narrow above, slightly enlarged at the top, 

 considerably so in front by the contraction of the body-whorl at the 

 base. Whorls 3, far from distinct, slightly rounded, of very grad- 

 ual increase; the extreme apex is minute, but papillary. Outer lip 

 rises very slightly above the flat crown, and here it is very patulous, 

 and almost emarginate ; just where it begins to run forward it is 

 very slightly expanded, from this point to the base it advances quite 

 straight, and a little inflected ; on the base it is freely rounded, 

 truncated and patulous. Top is barely oblique, and the rise of the 

 outer lip elevates that side, so that the whole top is almost flat, with 

 more or less of a depression in the middle where the minute dome- 

 shaped apex rises. Inner lip : there is a strong, well-defined labial 

 glaze which runs quite straight and continuously from the outer lip 

 across the scarcely convex body, and passes on with a quick deflec- 

 tion to the left into the slightly concave, scarcely toothed, oblique, 

 truncated pillar, where the lip is narrow, expanded, and appressed, 



