-
structures belong to the
third neanic substage, the second, or unicarinate,
substage thus
occupying the
greater part of the
neanic stage. The discontinuation...
-
several deeply placed basal folds, all
growing continuously from an
early neanic stage. The
peristome is more or less
thickened and expanded, the ends of...
-
keeled medially. This keel
develops into a
strong feature in the
brephic and
neanic stages, but on
approaching the
adult is not so
clearly marked. The s****...
-
fusiform s****
contains eight whorls. In the
young growth is flat. In the
neanic and
ephebic stages the
whorls are
subangulately convex,
rapidly increasing...
- into well-defined
sulcations as the s**** p****es from the
brephic to the
neanic stages of growth. The s**** as a
whole is elongate, the
aperture being much...
-
indicating the
position of the sinus. The
whorls throughout the
brephic and
neanic stages are flat, with a
deeply impressed suture, but in the
adult stage...
