LEPAS BARNACLE. 205 



CHITON Squamosus* 



SCALY CHITON. 



Specific Character. Shell with eight valves, 

 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 che- 

 quered with light green and dark olive scales. 



Inhabits the coasts of America. 



Genus LEPAS,f (Plural, Lepades.) 



BARNACLE. 



Generic Character. Shell multivalve, more 

 or less of a conical form, either affixed by their 

 base, or by a peduncle ; valves erect, oval, une- 

 qual, 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. ' .fy "I 



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



