THE. 
ARGONA U T, 
OR 
PAPER NAD TIL YS. 
DEEPER EEE EEE EEO 
GENERIC CHARACTER. 
Animal extremely refembling a Sepia. 
Shell univalve, {piral, extremely thin. , 
SPECIFIC CHARACTER, Cc. 
ARGONAUT with whitith furrowed fhell, with 
the keel dentated on each fide, 
THE PAPER NAUTILUS. 
NAUTILLE PAPIRACE. 
"Argen. t. 5. 
Notwithftanding the general fimilarity of ftructure 
which prevails amongft animals of the fame tribe, there 
are yet fome remarkable deviations from it. This is no 
where more confpicuous than in the teftaceous tribe, in 
which the inhabitants of moft of the Univalves bear a 
{trong affinity to the genus Limax, or Slug, while thofe 
of almoft all the Bivalves are diftinguifhed by a ftriking 
fimilarity to the genera of Tethys and Afcidia. Amongft 
the inftances of deviation from the general plan may 
be 
