106 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 
Odostomia (Menestho) trifida bedequensis new subspecies. 
PL 13, fig. 49. 
Shell similar to that of Odostomia {MenestJw) trifida but much 
larger in every way. The spiral sculpture is usually stronger than in 
trifida, and there is a tendency to split the spaces between the deeply 
incised grooves by the introduction of additional spiral lines. 
The type has seven post-nuclear whorls and measures: length, 
5.0 mm.; diameter, 2.1 mm. 
The type, cat. no. 203,802 U. S. N. M., and nine additional speci- 
mens were collected by Rev. H. W. Winkley, at Bedeque, Prince 
Edward Island; ten more from the same lot are in Rev. H. W. 
Winkley's collection. 
Odostomia (Menestho) bisuturalis (Say). 
PI. 14, fig. 59. 
Turritella bisuturalis Say, Journ. aead. nat. sci. Pliila., vol. 2, p. 244, 1821, 
= Jaminia exigua Couthouy, Boston journ. nat. liist., vol. 2, p. 92, pi. 1, fig. 
7, 1838. 
Shell conic, milk white. Nuclear whorls at least two, depressed 
helicoid, a little more than half obliquely immersed in the first of the 
succeeding turns. Post-nuclear whorls moderately rounded, some- 
what shouldered at the summit, marked axially by incremental lines 
only; spirally, by one deeply incised channel situated a short distance 
anterior to the summits of the whorls, and many microscopic wavy 
spiral striations. The deep channel is crossed by numerous fine 
raised axial threads. Sutures well impressed. Periphery and base 
of the last whorl inflated, marked by incremental lines and microscopic 
wavy s])iral lines only. Aperture large, elongate- oval, somewhat 
effuse anteriorly, posterior angle acute; outer lip thin; columella 
slender, slightly curved, strongly reflexed, with the anterior half free, 
provided with an oblique fold at its insertion, which is not ^^sible 
when the aperture is ^'iewed squarely; parietal wall glazed by a thin 
callus. 
The specimen described and figured, cat. no. 159,816 U. S. N. M., 
comes from Parker's Point, Wood's Holl, Mass. It has eight post- 
nuclear whorls and measures: length, 4.7 mm.; diameter, 1.8 mm. 
