372 ACCOUNT OF 



TESTACEA or SHELLS. 



Animals soft, of a simple Structure, and covered 

 with a calcareous Habitation or Shell. 



MU L TIVA L VIA, 



CHITON. 



Animal inhabiting the shell a Doris. Shell con- 

 sisting of several segments or valves, disposed 

 down the back in a longitudinal series. 



No. Name. 

 1. marginatus, 



2. cmereus. 



3. fascicularis. 



4. laevis. 



Authors. Habitat, and Remarks. 



P. M. Neighbourhood of Dunbar. 



Valves of this shell have 

 been procured of three- 

 fourths of an inch in width; 

 but never a living speci- 

 men answering to this size. 



M. Ditto, plentiful. 

 M. Ditto, not common. 

 M. Ditto, very rare. 



LEPAS. 



Animal a Triton. Shell affixed at the base, and 

 consisting of many erect valves. 



