PURPLE-SHELLS. 



TRUMPET-SHELLS. 



(1) Murex trunculus^ L. \. 



(2) Purptira h&mastoma. Lam. ^. 



(3) Murex branderis, L. \ (after Reeve). 



(4) Triton tritonis, L. ^-, showing blow-hole on side of spire. 



(5) Turbinella pyrn tn, L. (the Chank), J. showing blow-hole at apex of spire. 



(From drawings by Mrs. Wilfrid Jackson. ) 



