66 
room viii. i n the Museum at Paris, of which there is a mo- 
Nat. Hist. f ] e l 9 [ n wax , in this compartment. The original 
was brought by M. Huon, one of the Officers, 
sent in search of La Peyrouse, from the South 
Seas. This singular shell is suspended below the 
belly of the animal, and seems destined to cover 
and protect the heart and branchiae. 
Table 31. Miscellaneous. A dissected Nau¬ 
tilus, shewing the interior chambers of the 
shell; one valve of a large Meleagrina margariti- 
fera, or pearl muscle—various specimens of 
pearls, which are produced by disease in shells. 
Some of the pearls, in this case, attached to 
fragments of shell, shew the manner in which 
the animal may be made to produce, apparently 
line pearls, by an artificial process. Spherules 
of shell, or some other substance, flattened at 
the bottom, are forcibly inserted between the 
animal and the shell, in such a way that it can¬ 
not displace it—which in a short time is covered 
with a layer of pearly matter, secreted by the 
mantle of the animal. Two pair, and a single 
valve, of extraordinary size, of the Pinna 
squamata ; the byssus, or beard of the pinna, 
and a pair of gloves, made of the same sub¬ 
stance, &c. This table contains also the An¬ 
nul ala sedentaria, or shells of annulated worms, 
the third order of the ninth class; amongst 
which are Siliquaria, several Dentalia, Magilus, 
Galeolaria (both very rare), Vermicularia, Ser- 
pularia, &c. 
NINTH 
