vl INTRODUCTION. 
sit, the connoisseur might discover some rare 
or interesting varieties. 
On the sand, at low water, bubbles of froth 
may be frequently observed: these are indica- 
tions that some marine animal or shell is con- 
cealed underneath, which may generally be 
found by digging a few inches below the surface. 
I SHALL conclude my observations upon this 
subject, with strongly recommending the voy- — 
ager to employ fishermen to collect for him.— 
These men are well acquainted with the places 
where shells may be found, and, for a trivial 
remuneration, would reserve what they met 
with. 
It would also amply repay him, to hire an 
expert negro to go into the interior in quest of 
LAND-SHELLS; for, though they are less beau- 
tiful than those ofthe Sea, yet they are interest- 
o 
