234 MOLLUSCA. 
under the projecting ledges of the strata he will find many 
species of shells in very perfect state. 
In rocky shores it will prove a useful employment to turn 
over the stones which are scattered in the pools, near low 
water, and on the under side of these he will find a rich har- 
vest of Chitons and Cingule. 
In the tufts of Corallina officinalis, a number of the small- 
er shells are found concealed, likewise among the smaller 
Fuci and Conferve. When these bodies are brought from 
the shore, and put into a glass of sea water, the smaller shells 
will soon be perceived by their motions. 
When vessels which have been long at sea come into dock 
to be cleaned, their bottoms are often covered with shells, 
and with sea-weed, containing numerous rare vermes. To 
such situations the conchologist should resort; and in these 
he will often be successful in finding the objects of his pur- 
suit. In illustration of this remark, we may mention the 
circumstance of the vessel employed at the Bell Rock as a 
floating light, having had her bottom covered with mussels 
three inches and a half in length, and upwards of one inch 
in breadth, although she had only been afloat three years 
and seven months. She was moored the 11th July 1807, 
and removed the 1]th February 1811. Previous to being 
moored, she was completely caulked and pitched. The sand 
on the shore likewise yields many of the smaller species of 
shells, and should be carefully examined with the micro- 
scope. 
When sea shells are obtained, they should be plunged into 
boiling water, to facilitate the extraction of the animal, and 
afterwards soaked in it for some time to remove the salt. 
They should then be cleaned with a brush, and all extran- 
eous matter removed. When the shells are not soaked in 
