CROWNED GONDOLA SHELL. 
Cup, which the Dutch name Gekroon de 
Bak, or Kroonhoorn But, though Rum- 
phius be the principal systematic author, rela- 
tive to all which concerns shells, it happens, 
with regard to this shell, as well as on some 
other occasions, that he is not followed by the 
Amateurs ; who' will neither suffer it to pass 
under the name of the Crown Shell, nor ad- 
mit it's introdu61ion among those which are 
denominated Volutes. In fa£l, there is a Cor- 
net, or Horn Shell, to w^hich the name of 
Crowned Horn has been appropriated ; not- 
withstanding that, in the class where this shell 
ought to be ranged, the Dutch have long 
sirxe m'^de a particular species, which they 
name Bakken ; that is to say, Troughs, or 
Boats. The Dutch, indeed, give the name of 
Bak, to all hollow wooden vessels in which 
any thing may be placed as in a little trough. 
It is thus that they call Bakken, or Troughs, 
all shells which have large apertures, and arc 
hollow their whole length, whether they be 
more or less bellied : and it is for this reason, 
that they give to certain Horn Shells, or Cor- 
nets, the name Trough of Agate ; because 
the opening is larger, and they are more bel- 
lied. 
