ie K 
7: 
Re ihe ‘ e 
“4 
= 
a ? 
- 
Shs 
pe 
la—c. 
_ 2a—b, 
TAB. IH. 
Nautilus centralis, p. 45. 
a. Back view. 
6. Side view. 
Cc. 
Do., young shell. 
Nautilus urbanus, p. 46. 
a. Side view, young shell. 
6. 
Do., adult do. 
