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 chequered with light 

 green and dark olive scales. 



Inhabits the coasts of America. 



Genus. LEPAS.f Plural, Lepades. 



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 af- 

 fixed at their base ; those of the other are pedun- 

 cled. 



Though dissimilar in their appearance, these 

 shells are united by many points of resemblance ; 



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



