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 Cingulae. 



In the tufts of Corallinaqfficmalis, a number of the small- 

 er shells are found concealed, likewise among the smaller 

 Fuci and Confervae. 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 llth July 1807, 

 and removed the llth 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 



