[ 21 ] 



FIG. 74. 

 NAUTILUS Re6lus geniculis depreflls. 



The ftrait nautilus with depreffed joint*, 

 The colour pellucid white. 

 From ijandwich — exceeding rare. 



M Y T I L U S. The Mufcle, 



F I G. j^. 



MYTILUS Striatus umbonibus produ6lis. 



The ftriated mufcle with lengthened beaks,. 



The colour pellucid white. 



From Reculver and Sandwich — not uncommon^ 



F I G. 76. 



il/YTJLU3 Lffivis valvulis antice inflexis. 



The finooth mufcle, with the valves inflefted in front, • 



The colour brown and glofTy. 



From a frefh water ftream near Faverfliam — commorr, 



F I G. -jj. 



MYTILUS Subrhombiformis punflatus. 



The fubrombic dotted mufcle, 



The colour pellucid white. 



From Sandv/ich — common> 



FIG. ']^, 



