= 
PLATE If, 
. a. b. c. d. Nautilus melo, with sections. 
2. Section of Nautilus flammatus, shewing the siphon. 
is) 
. Nautilus Pompilius. 
. Section of Nautilus caudatus, Lister (N. major seu crassus, Rumph.) 
shewing the siphon passing through the chambers. 1-4th. 
. Nautilus auricula. 
. Scaphites Defrancii. 
a. b. c. d. Scaphites equalis. 
. 8. Transverse and logitudimal sections of the spine of the Echinus ci- 
daris. 
