THE 



ARGONAUT, 



OR 



PAPER NAUTILUS. 



Generic Character, 



Animal extremely refembling a Sepia. 

 Shell univalve, fpiral, extremely thin. 



Specific Character, &c, 



ARGONAUT with whitifh furrowed ffeeM, with 

 the keel dentated on each fide, 



THE PAPER NAUTILUS. 



NAUTILLE PAPIRACE. 



Argenv. t. 5. 



Notwithstanding the general fimilarity of ftrudture 

 which prevails amongft animals of the fame tribe, there 

 are yet fame remarkable deviations from it, This is no 

 where more confpicuous than in the teftaceons tribe, in 

 which the inhabitants of moft of the Univalves bear a 

 ftrong affinity to the genus Li max, or Slug, while thofe 

 of atmoft all the Bivalves are diftinguifhed by a linking 

 fimilarity to the genera of Tethys and Afcidia. Amongft 

 the inftances of deviation from the general plan may 



