JJtire. It is ufually of a fine deep rufous-brown; fome- 

 times mottled with yeHowifh-white, with a fmall line of 

 the fame along the back ; but this is not a permanent 

 charafler, as it fliould feem to be by Mr. Pennant's 

 defcription. 



We have frequently found it willi the preceding fpecies 

 in Silcomb bay, from which it is principally diRinguiflied 

 by not being fo broad ; in being fmooth, and the margin 

 bein^ reticulated. 



3. 

 C. with feven carinated valves, flrongly beaked; the Septemvalvis. 

 five middle ones divided tranfverfely from the anterior 

 bafe to the beak, the hinder compartment very fine flia- 

 green, the other very fmooth, or faintly (Iriated tran- 

 verfely: the extreme valve at each end rufous-brown, the 

 reft generally dark cinereous ; beaks frequently rufous ; 

 margin moderately broad, and faintly reticulated : fliape 

 of the laft defcribed : length half an inch. Found in 

 Salcomb lay, but rare. 



4. ••► 

 Chiton Cinereus. lAn. Syjl p. 1\07.— Gwe]. Syft. p 3204. Cinereus.' 

 PuJt. Cat. Dorfet. p. 25. 

 Tnrt. Lin. iv. p. 163. 



C, wi)h eight valves nearly fmooth, comprefTed, oval, 

 carinated : the valves projefting into a beak on the back, 



B 2 and 



