86 THE NAUTILUS. 



Power's experiments, supported as they are in the main by 

 those of Sander Rang ; and a study of Professor Owen's ably 

 reasoned report on them, * and on the opposing facts, htive 

 convinced me of its erroneousness ; and now I believe the 

 shell and the cephalopod to be one species and individual, 

 whose curious history will occupy us in a future letter. 



they have no apparent analogy to those bodies, which arc secreted by the 

 oviduct as the eggs are deposited. 



" These various views shew that the origin of the shell is not yet dis- 

 tinctly settled." — Calalvgue of Ceplmlopoda in Brit. Mus. 28. 



"^ The reader will find the various papers alluded to in the first and 

 third volumes of Charlesworth's Mag. of Nat. History, and in the Notices 

 of Connnunications to the British Association for the Advancement of 

 Science, 1844, p. 74. 



