1/4 SPECIFIC 



For permission to make a drawing of this and of 

 fig. 4, the author begs to acknowledge his obhga- 

 tioii 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 ; late- 

 ral 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 scarcclv credible that 

 so extraordinary a production should have been 

 omitted in modern catalogues. It is a valuable ac- 

 quisition to its genus, and is indeed well worthy of 

 being placed at the head of an armed divisioji. 



