SCALARIA. 63 
SCALARIA. 
Sub-turreted, with longitudinal elevated sub-acute 
interrupted ribs ; mouth rounded, entire, with a 
reflected maryin. 
_ §. pretrosa. Conic, umbilicated, loosely 
twisted into a spiral shape, cream-colour, with 
the ribs white; whorls disunited, smooth; the 
last ventricose; up to6. W. 31. 88. 
S. LAMELLOSA. Whitish, imperforated, sub- 
turreted, with thin white denticulated lamelli- 
form ribs; whorls contiguous and smooth, the 
last with a keel environing the base. 1. W. 
Sup. 6. 17. 
S. communis. Imperforate, turreted with 
rounded sub-contiguous whorls, and thick lon- 
gitudinal oblique ribs; white, with the interstices 
of the ribs more or less striated transversely with 
brown. 1}. B. W. 31. 90. 
S. FRAGILIS. Much resembles S. lamellosus; 
but its ribs are more numerous, its texture thinner, 
pure white; destitute of the keel ; much smaller. 
S. RARIcosTA. Turreted, perforated, white, 
with transverse most slender striz, and obsolete 
