200 MULTIVALVES. 



CHITON Squamosus.* 

 SCALY CHITON. 



Specific character. Shell with eight vaKcs, 

 one half of each valve is striated longitudinally, 

 and the other half transversely; the margin 

 scaly ; the outside is dark brown, more or less 

 variegated with olive, and the inside is light 

 bluish green ; the margin is beautifully chequered 

 with light green and dark olive scales. 



Inhabits the coasts of America. 



GENUS. LEPAS.t 



BARNACLE. 



Generic character. Shell multivalve, more or 

 less of a conical form, affixed at the base ; valves 

 erect, oval, unequal, varying in number, most 

 frequently six. 



OBSERVATIONS ON THE SHELL AND ITS 

 INHABITANT. 



This genus consists of two principal divisions; 

 the shells contained in the one are sessile, or 

 affixed at their base, those of the other are 

 peduncled. 



* Plate X. figure 5. f Plate X. figures 6, 7. 



