JACOBINE SHELL. 
This shell is a Bivalve, of the family of 
Pe6lens, or Escallops ; the chief, or essential 
charadter of which, is a trigonal sinus, and 
an elastic cartilage for it's hinge, in the very- 
centre of the top of the sh^ll: the subordinate 
* chara6ler is, their being eared. Most authors, 
indeed, have injudiciously made it the principal 
charader ; though there are other eared shells 
besides Escallops, as well as some Escallops 
without ears. The other subordinate charac- 
ter is, that of having the top run into a perfect- 
ly straight line, and thence gradually widening 
to a round bottom. Of this very numerous 
, ,and beautiful family, the under shells are al- 
ways fainter than the colour of the upper 
'shells, and sometimes are of quite different 
colours. 
The annexed figure, painted by Kleemann, 
an ingenious German artist, represents the un- 
der side of the escallop, called by some the 
Shell of St. James, and by others the Jacobine 
Shell. It is about four inches in height, and 
five 
