CEPHALOPODA. 

 Piff. 2. 



VO 



'. Bb 





V 



is 1 





J 



11 



The Common Cuttlefish (Sepia officinalis), and its shell or bone (a). 



Fig. 3. 



^1 

 1 



-- u 



a 



The Spirula (Spirula peronii). (From the Indian and Pacific Oceans.) 



1. Animal : a, portions of the shell exposed in front and behind ; b, the 

 funnel or siphuncle. 2. Side view of shell. 3. Shell in section, to 

 show partitions or septa. 



