Periwinkle. 05 
George’s Sound. Fig. 5 is called Cook’s Turbo 
(T. Cookii); this is a handsome South Sea shell, 
oftentimes of large size. It has been found in great 
numbers on the coast of New Zealand. 
On Plate IV. we have placed two very curiously 
formed and marked shells, called Wentletraps, also 
belonging to the family Turbinide. The scientific 
name is Scaluria, from the Latin scala—a ladder, 
which the ribbed shells are supposed to resemble. 
Of this genus there are about eighty distinct species 
known ; they are mostly deep-sea shells found in 
warm latitudes, although several inhabit the Hu- 
ropean seas, and one, the Common False Wentle- 
trap (S. communis), Fig. 1, may often be picked up 
on our own shores. Tig. 2, the Royal Staircase 
Wentletrap, is a rare and valuable shell, generally 
brought from India and China; the scientific name 
is S. pretiosa, given to it by the French naturalist 
Lamarck, on account of the high price which it 
fetched ; pretiose, in Latin, meaning costly, valuable. 
As much as £100 have been given for a single 
specimen of this shell; and a fine one, especially 
if it exceed two inches in length, yet commands a 
considerable sum, although not nearly so much as 
that. A good deal like the False Wentletrap in 
general outline, is the Awl-shaped Turritella, found 
