91 
TROCHUS monilifer, 
TAB. CCCLXVII. 
Spec. Char. Conical, transversely striated; 
volutions rather convex with three rows of 
tubercles and crenated edges ; base slightly 
convex bearing six rows of granules ; aper- 
ture quadrangular ; columella curved along 
one edge of the aperture, truncated. 
Syn. Trochus nodulosus. Brander, f* 6. 
T. monilifer ? Lamarck env. de Paris , p. 99* 
A regularly conicalshell whose base is equal in diameter 
to the height. The aperture is placed obliquely, it has an 
entire waved edge. The tubercles upon the spire are 
placed upon transverse elevations, that give the volutions 
a convex appearance ; the centre of the base is smooth 
but not umbilicated ; the inside is pearly. 
For excellent specimens of this long known elegant 
Trochus, we are indebted to Miss Teed, who sent them 
from Hor dwell. It is probable that the T. monilifer of 
De Lamark is a distinct species, although nearly related 
to the Hampshire Trochus nodulosus, for the only 
specimen I have from France has rather concave whorls, 
a flat base, with the columella projecting, and eight 
rows of granules, agreeing with La mark’s description 
and besides, the surface shews no transverse striae, 
but it is not perfect, it is certainly a distinct species ; but 
that it be Lamarck’s, I have no proof, and Lamarck re- 
fers to Brander’s nodulosus, which is quite distinct from 
the recent species of that name. 
