74. A pearly, or chambered, nautilus, Nautilus luacioinijluilus. thiit lived for fiftv- 

 iiine days in the aquarium at Noumea, New Caledonia. The many small arms can be 

 withdrawn into the shell's last chamber, and the entrance closed by the hood seen 

 abo\e the arms. (Rene Catala) 



75. The common cuttlefish of Europe, 

 Sepia ofpciiiali.s. in a tank at the Den 

 Helder Zooloajical Station in Holland. 

 One of the two females is attaching black 

 egg capsules, one b\ one, to the stick in 

 the foreground. ( Ralph Buchsbaum ) 



