* 7 ' 
A. E. Terrill — Catalogue of Marine AfoOttsra. 
B*la pUurotom aria (Couthouy) Adams. 
Fstsms ftiemt atonrin Couthouy. Boston Journal of Natural History, rol. ii.. p. 107 
pL 1, fig. 0. 1838. 
Fm&'is n/ms Gould. Invert, of Mass. ed. i. p. 290. fig. 192 isoa Montagu . 
t Bmccimmm pyramidal* Strom. N. A Dan., iii, p. 296. fig. 22 1 / no* Bda p y ramid aHa 
G. 0. Surs . 
Defrancia FjA Hi tBeek Mdller. 1S42 it Loven). 
Mamgdia pyrwwNhh'r Stimpeon. Shells of New England, p. 49. 1851. 
Bda plemrofomaria H. and A. Adams. <.7enera Recent Molluscs, i p. 92. 185s 
Gould. Invert, of Mass- ed. ii. p. 355. fig. 625. 
Verrill Report Invert. Anim. of Vineyard s<L in 1st Rep. U. S. Fish Com., p. 
637. 1874. (auth. cop., p. 343V 
shell long-fusiform, with a high, taperiug. acute spire. Whorls 
'even or more, well-rounded, not distinctly shouldered nor carinated. 
-'rioted above the sutures, which are well-impressed and not very 
oblique: no distinct 'tibsuturai band. Ribs about 13 to Iti on the 
last whorl, rather prominent, rounded, sigmoid, strongly excurved 
on the upper part of the whorl, incurved and less prominent close t*» 
the suture: they fade out below the middle of the whorl: on the 
preceding whorls they art prominent at and above the middle, and 
decidedly dgmoid : the intervals between them are deeply concave 
and rather wider than the ribs. The spiral cingnli are numerous, 
tine. wavy, unequal, and inconspicuous, becoming more distinct, and 
rather coarser toward the anterior pan of the body-whorl, and on 
the uppermost whorls ; they are often absent across the ribs, and 
frequently are scarcely apparent, even with a lens, on the more con- 
vex part of the lower whorls, where they are always fine: they are 
also fine on the snbsutural portion. 
The nncleti' is small, bat prominent, with the whorls separated bv 
deep sutures : the first half-whorl is smooth : then three raised spiral 
cingnli appear, which become strong carime on the second whorl : 
on the third and fourth whorls these are crossed by raised riblets. 
producing a cancellated sculpture. 
The aperture is short and small, narrow -ovate : the outer lip has a 
very distinct, wide, shallow sinus: below this it is evenly rounded, 
a very little incurved at the ba'e of the canal, which is 'hort. -traight. 
and narrow. 
Color, when fresh, pale chest nut-brown to reddish brown, usually 
paler anteriorly. 
A specimen of the stouter variety, having stven whorls, is 13 "25'- 
long: breadth, *> ma5 - : length of body-whorl. 9“*' ; breadth. 51 o mm ; 
