80 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 
penultimate turn they are irregular and irregularly spaced. All the 
ribs are protractive. Periphery of the last whorl inflated and well 
rounded. Base rather short, well rounded, marked by the feeble 
continuations of the axial ribs. The entire surface of the spire and 
base is crossed by very fine, closely spaced spiral striations which pass 
equally strong over the intercostal spaces and ribs. Sutures wqW 
impressed. Aperture ovate, somewhat efl^use anteriorly, posterior 
angle acute; outer lip thin; columella slender, curved and slightly 
revolute, showing a weak oblique fold at its insertion which is scarcely 
visible when the aperture is \'iewed sc^uarely. 
The adult shell has eleven post-nuclear whorls and measures: 
length, 11.2 mm.; diameter, 3.0 mm. 
The following specimens have been examined: — • 
No.of U.S.F.C . 
. Cat. no. spec. sta. Locality. 
34,999 1 2076 Off George's Bank 
52 321 1 2571 S.E. of George's Bank 
45,476 1 2213 " of Martha's Vin'd, Mass. 
52,319 2 2547 " " 
45,472 1 894 Off 
45,471 4 892 " 
45,470 2 891 " 
45,467 2 1143 " 
37,973 46 2221 S. of 
203,225 7 2221 " " 
40,264 2 2237 " " Long Island. N. Y. 
40,244 1 2234 " " " 
Depth 
Disposition of 
(fms.). 
Temp. 
material. 
906 
v. S. nat. mi 
1356 
38° 
" " " 
384 
39° 
" " " 
390 
40° 
" " " 
365 
40° 
" " " 
487 
" " " 
480 
" " ' 
452 
40° 
" " " 
1525 
36° 
" " ' 
1.525 
36.9° 
" " ' 
520 
39° 
U ii u 
816 
39° 
" " ' 
Turbonilla (Strioturbonilla) bushiana abyssicola new subspecies. 
PI. 11, fig. 14. 
Shell similar to that of hns'liiana but with stronger and much more 
regular axial ribs. The summits of the whorls are also slightly 
shouldered and the sutures are rendered subcrenulate by the axial 
ribs. The specimen here described has lost the nucleus and probably 
one post-nuclear whorl. There are 19 ribs upon the 4th; 20 upon the 
5th to 8th; 22 upon the 9th; 24 upon the 10th; and 28 upon the 
penultimate turn; upon the last half of this, they become quite en- 
feebled and irregular as in bushiana. The spiral sculpture is the same 
as in bushiana, likewise the nucleus. 
The specimen described is cat. no. 153,540a U. S. N. M. It was 
