102 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 
Aperture elongate-ovate; posterior angle obtuse, outer lip thin; 
columella slender, decidedly curved, slightly reflexed, provided with 
a very weak fold at its insertion which is not visible when the aperture 
is viewed squarely; parietal wall covered by a thin callus. 
The type, cat. no. 203,813 U. S. N. M., comes from Wood's Holl, 
Mass.; it has five post-nuclear whorls and measures: length, 3.3 mm.; 
diameter, 1.7 mm. Three additional specimens, cat. no. 203,814 
U. S. N. M., also from Wood's Holl, Mass. 
Menestho Moller. 
Menestho Moller, Ind. Moll. Greenland, p. 10, 1842. 
Shell not umbilicated, marked by moderately well developed and 
usually equally spaced spiral cords; axial sculpture reduced to mere 
lines of growth which frequently appear as veri/ slender raised threads 
in the grooves between the cords. 
Type, Turbo albulus Fabricius. 
Key to the Species of Alenestho. 
A. Spiral sculpture confined to the anterior two thirds of the body-whorl 
bruneri. 
AA. Spiral sculpture not confined to the anterior two thirds of the body- 
whorl. 
a. Spiral sculpture alike on the spire and base. 
Spiral cords between the sutures: 
4 impressa. 
6 morseana. 
aa. Spiral sculpture not alike on the spire and base. 
c. Spiral sculpture between the sutures consisting of a single groove. 
Adult shell 4.0 mm. long trifida. 
Adult shell 5.0 mm. long trifida bedequensis. 
cc. Spiral sculpture between the sutures consisting of from two to 
four strong grooves. 
Adult shell 4.7 mm. long bisuturalis. 
Adult shell 5.6 mm. long bisuturalis ovilensis. 
Odostomia (Menestho) bruneri (Verrill). 
Menestlio bruneri Verrill, Trans. Conn. acad. arts and sci., vol. 5, p. 539, 
1882. 
"Shell small, white, with an elongated, acute-conical spire, the 
apical whorl very small, upturned, and incurved. Whorls six, with 
