86 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 
being subequal. Aperture ?, outer lip fractured; columella stout 
and slightly revolute. 
The type, cat. no. 193,352 U. S. N. M., has nine whorls remaining 
and measures: length, 5.3 mm.; diameter, 1.6 mm. 
The following specimens have been examined : — 
Cat. no. 
83,410 
721 
No. of 
spec. 
1 
1 
Locality. 
Swampscott, Mass. 
Wood's Holl, " 
Disposition of 
material. 
U. S. nat. mus. 
Wood's Holl coll. 
790 
1 
U ti It 
It It It 
193,352 
19 
Branford, Conn. 
U. S. nat. mus. 
100 
(I II 
' H. W. Winkley coll, 
Turbonilla (Pyrgiscus) areolata Yerrill. 
PI. 12, figs. 19, 24. 
Turbonilla areolata Verrill, Rept. U. S. comm. fish and fisheries, pt. 1, p. 
658, 1873. 
Shell stout, obelisk-shaped, light yellow. Nuclear whorls very 
small, two and one half, forming a moderately depressed helicoid 
spire, which has its axis almost at right angles to that of the succeeding 
turns in the first of which it is about one fourth immersed. Post- 
nuclear whorls almost fiat, faintly shouldered at the summit, crossed 
by strong, low, rounded axial ribs of which there are 20 upon the 1st, 
2d, and 3d; 22 upon the 4th; 24 upon the 5th; 28 upon the 6th; and 
26 upon the penultimate turn. The spiral sculpture consists of five 
rows of strong subequal and subequally spaced pits which cross the 
intercostal spaces but not the ribs. In addition to these, two very 
fine spiral striations are situated between the uppermost coarse line 
and the summit of the whorl. Periphery of the last whorl smooth, 
excepting the faint continuations of the ribs; well rounded. Base 
well rounded, marked by eight, wavy, spirally incised lines. Aperture 
ovate, posterior angle acute; outer lip thin showing the external 
sculpture within; columella slender, slightly curved, and slightly 
revolute. 
The specimen described and figured, cat. no. 203,765 U. S. N. M., 
comes from Wood's Holl, Mass. It has eight post-nuclear whorls and 
measures: length, 5.1 mm.; diameter, 1.5 mm. 
