THE 
ARGONAUT, 
OR 
PAPER NAUTILUS. 
Generic Character . 
Animal extremely refembling a Sepia. 
Shell univalve, fpiral, extremely thin. 
Specific Character , &c. 
ARGONAUT with whitifh furrowed fhell, with 
the keel dentated on each tide. 
THE PAPER NAUTILUS. 
NAUTILLE PAPIRACE. 
Argenv. t. 5. 
Notwithftanding the general limilarity of ftrudture 
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 mod of the Univalves bear a 
ftrong affinity to the genus Limax, or Slug, while thofe 
of almoft: all the Bivalves are diflinguifhed by a linking 
limilarity to the genera of Tethys and Afcidia. Amongft 
the inftances of deviation from the general plan may 
be 
