BARTSCH: NEW ENGLAND PYRAMIDELLIDAE. 99 
Odostomia (Chrysallida) willisi new species. 
PI. 13, fig. 42. 
Shell very small, elongate-ovate, milk white. Nuclear whorls 
small, smooth, obliquely immersed in the first of the succeeding turns 
above which only a fraction of the uptilted last and a bit of the preced- 
ing whorl project. Post-nuclear whorls weakly rounded, somewhat 
shouldered at the summit, ornamented by weak nodulous axial ribs 
of which about 20 occur upon the 2d, 26 upon the 3d and the penulti- 
mate turn. In addition to the ribs there are four low broad spiral 
cords, separated by narrow grooves that divide the space between the 
sutures into four subequal areas of which the peripheral one is the 
widest and the one at the summit the narrowest. The junctions of 
ribs and cords form the nodules, the posterior row of which is the 
strongest and gives the whorl a coronated appearance. Periphery of 
the whorls marked by a deep groove which is visible between the 
sutures above the summit on the last turn. Base of the last turn well 
rounded, marked by six spiral grooves which are subequal and un- 
equally spaced. The grooves are crossed by many slender, closely 
placed lirations which give them a ])unctate appearance. Aperture 
(of adolescent specimen) elongate-ovate, somewhat effuse at the 
junction of the columella and outer lip; posterior angle obtuse; outer 
Up thin showing the external sculpture within; columella evenly 
curved, reflexed, and re-enforced throughout its entire length by the 
attenuated base, provided with a strong oblique fold at the insertion 
which is just visible when the aperture is viewed squarely; parietal 
wall covered by a thin callus. 
The type has four and one half post-nuclear whorls and measures: 
length, 2.3 mm.; diameter, 1.2 mm. The type and eight specimens, 
cat. no. 203,796 U. S. N. M., were collected by Mr. Willis at Summer- 
side, Prince Edward Island. 
Another lot, cat. no. 203,798 U. S. N. M., 23 specimens, wa? col- 
lected by Rev. H. W. Winkley at the same locality. 
Odostomia (Chrysallida) bushiana new species. 
PI. 13, fig. 44. 
Shell elongate-ovate, chalk white. Nuclear whorls completely 
immersed in the first of the succeeding turns. Post-nuclear whorls 
