NAUTILUS SYPHO. 357 
the Wisdom in which such exquisite contrivances 
originated, and setting forth the Providence and 
Care of the Creator, in regulating the structure 
of every creature of his hand. 
SECTION V. 
NAUTILUS SYPHO, AND NAUTILUS ZIC ZAC. 
The name of Nautilus Sypho* has been ap- 
plied to a very curious and beautiful chambered 
shell found in the Tertiary strata at Dax, near 
Bourdeaux ; and that of Nautilus Zic Zac to a 
cognate shell from the London Clay. (See PL 
43, Figs. 1, 2, 3, 4.) 
These fossil shells present certain deviations 
from the ordinary characters of the genus Nau- 
tilus, whereby they in some degree partake of 
the structure of an Ammonite. 
These deviations involve a series of compen- 
sations and peculiar contrivances, in order to 
render the shell efficient in its double office of 
acting as a float, and also as a defence and 
chamber of residence to the animal by which it 
was constructed. 
Some details of these contrivances, relating 
* This shell has been variously described by the names of Am- 
monites Atun, Nautilus Sypho, and N. Zonarius. (See M. de 
Basterot. Mem. Geol. de Bourdeaux.) 
