94 BOOK OF SPECIES. 
long beak slightly bent upwards; aperture nearly 
as the last ; but the membrane somewhat purplish. 
23. W. 26. 46. 
T. RUBECULA. Oblong, thick, with granulated 
transverse ribs, and their interstices decussated 
and darker than the reddish orange which is the 
ground of the shell; varices frequently marked 
with white; spire obtuse; pillar bright orange, 
striated with white; lip white within and den- 
tated ; beak shortish. 14. W. 46. 42. 
T. uNDosum. Ovate-acute, thickish, white, 
with many glabrous brown spiral belts; the body- 
whorls plaited longitudinally ; mouth white, with 
the lips furrowed within, and thickened; beak 
short. 14. W. 23. 97. 
LES AILEES. 
ROSTELLARIA. 
Shell fusiform or sub-turreted, terminated infe- 
riorly in a canal, with a pointed beak; lip 
entire or dentated, more or less dilated by age, 
with a sinus contiguous to the canal. 
R. PESPELICANI. Turreted, greyish red, with 
the whorls angularly nodulous at the centre; lip 
glabrous, and expanded into three more or less 
channelled claws; channel of the base oblique, 
