MONOGRAPH 



OF THE GENUS 



NAUTILUS. 



' The Nautilus and the Ammonite 



Were launched in storm and strife ; 

 Each sent to float, in its tiny boat, 

 On the wild, wild sea of life. 



' And each could swim, on the ocean's brim, 

 And anon, its sails could furl; 

 And sink to sleep in the great sea deep, 

 In a palace all of pearl." — Richardson. 



