174 SPECIFIC 



For permission to make a drawing of this and 

 of Fig. 4, the author begs to acknowledge his 

 obligation to Lady Wilson, of Charlton House. 



Fig. 4. Chiton spinosus. 



Shell 8-valved, semi-granulate : margin spinous. 



Nondescript. 



Specimen fuscous, nearly black ; keel of the six 

 middle valves marked with a cordate red spot; 

 marginal membrane brown and broad ; spines 

 black, long, solid, subulate, and rather bent ; 

 lateral triangles on the valves granulate, remaining 

 areas transversely striate ; posterior valve entirely 

 covered with raised dots, internal surface whitish. 



Habitat unknown. 



This shell, which constitutes most unquestion- 

 ably a distinct species of Chiton, was lately brought 

 from Paris, but with it no information of the place 

 from whence it originally came. If it were not 

 unknown to naturalists, it is scarcely credible that 

 so extraordinary a production should have been 

 omitted in modem catalogues. It is a valuable 

 acquisition to its genus, and is indeed well worthy 

 of being placed at the head of an armed division. 



