6 
Genus IX. ^ATJfiLtrs. 
Will be difficult to affign them any other mode of progreffiort, 
All oriental travellers who have mentioned them agree in fuppofing 
them to be pelagian, or living out at fea, . as only their empty (hells 
are found near or on the fhore. 
78. Scrobiculatus—L’Etang— Pond— New Guinea-— Nautilus 
Scorbiculatus Soland. Very rare. 
7g, Umbilicatus— Le Nombril— Umbilicated, or Navel-like— 
Extremely fcarce, and is prefumed to be the only one of the fpecies 
in this country. It is diverted of the external coat, to fhevr 
the pearly one. 
Genus X. ARGONAUTA— Naittille Pa-pirace- -Paper 
Sailor. 
80. Corrugata— a. unalated, or without wings; l . alated, or 
winged— La Ridee— Wrinkled— Mediterranean and Eaft Indies— 
Argonauta Argo Linn. Rare. 
81. Nodofa— La Noueufe— Tuberculated, or Studded -—Cape 
Of Good Hope- -Argonauta Nodofa Soland. Rare. 
82. Hians — L’Ouvert — Open — China — Argonauta Hians 
Soland. Verv rare. 
83. Navicula- — La Gondole— Gondola— China— Argonauta 
Navicula Soland. Extremely fcarce. 
84.. Vitrea— Le Vitree, ou La Lanterne— GlafTy, or Lantern— 
Guinea ?— Only one other of this extremely delicate and curious 
fpecies is known in Europe, which was in the pofleffion of the 
late celebrated Mr. Lyonet, of the Elague, whofe fine collection 
of (hells was lart year fold there. The extreme point of the beak 
of Mr. Lyonet’s fpecimen was not fo complete as M. Calonne’s. 
The Species of the Genus Argonauta are efteemed as fome of the 
moft curious of the Teftacea, whether we regard the manners of the 
animals which inhabit them, or the delicacy and elegant form 
of their fhells. Like thofe of the Nautilus family, they fvvim 
on the furface of the waves, each fpreads a thin film for a fail, 
and puts forth arms, feJ&a^on each fide, which ferve for oars, in 
which manner they glide along, but fink inftantaneoufiy if but a 
fhadow pafs over them. The firft idea of the art of navigation 
is fuppofed to have been taken from thefe little failors, and it is 
to this family, one fpecies of which is certainly the Nautilus 
of the ancients, that the famous Mr. Pope alludes, in thofe well- 
known lines of his “ Eflay on Man,'* 
“ Learn of the little Nautilus to fail, 
“ Spread the thin oar, and catch the driving gale.” 
The {hells of the Paper Sailor are not chambered, as the Nautili 
are, nor are they pearly within. 
Genus XL BULLA— Bulle D’Eau— Bubble, or Dipper. 
83. Dubia — L’J.ncertaine — Doubtful — Amboyna— Very rare. 
The animal of the Bullaj genus is much too large to be 
