SECTION IX. 175 



preceding the Cowries, and following the 

 Paper Nautili. 



The arrangement that Rumphius, Ar- 

 genville, Linnaeus, Davila, and Meufchen, 

 give them as Cochleae Globofe, or Tuns, 

 is very furprizing and extremely erroneous: 

 fince they have avery different efl'ential cha- 

 rafter, though all have patulous or very 

 large mouths. For the Nuces, or Bulte, like 

 the Cowries, have no clavicle or turban ; 

 becaufe their fpircs are latent within their 

 bodies : whereas the Conchae Globofae, as 

 the Partridges, Tuns, Sec, are really turbi- 

 nated Shells, and have a very fair and ftrong 

 external clavicle, but It is generally flattifh, 

 or not much produced. 



Though there is a vafl: difference of co- 

 louring in the Dippers, I am, neverthelefs, 

 inclined to think they are only varieties, 

 and that this family is not numerous. 



The 



