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. 
ISIondescript . 
Specimen fuscous, nearly black ; keel of the six 
middle valves marked wdth 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 modern catalogues. It is a valuable 
acquisition to its genus, and is indeed well worthy 
of being placed at the head of an armed division. 
