1824-33 ‘MEMOIR ON THE PEARLY NAUTILUS’ 59 
many accounts, and I trust you will reap the 
benefit of it ultimately. . . . 
‘ I look forward with great and anxious plea- 
sure to the time when we may expect you to visit 
Lancaster, my dear son, which I fear may not 
be till next summer — a long period for one at 
my time of life. . . .’ 
Owen was occupied during the end of 1831 
3 -nd beginning of 1832 with the work which first 
attracted the attention of scientific men towards 
him, namely the ‘ Memoir on the Pearly Nautilus, 
1832,’ the description of which seemed to have 
given his mind a bent in a definite direction. 
On the appearance of this memoir it was 
translated into French by Milne Edwards, and 
into German by Oken. In it the author enters, 
in a way characteristic of subsequent memoirs, into 
collateral questions on which the new facts threw 
bght. He modifies the Cuvierian classification 
of Cephalopoda, based on characters of the shell, 
and proposes, on anatomical grounds, the orders 
Dibranchiata and Tetrabranchiata, which have 
been accepted. 
He had meanwhile moved from Cooks Court 
to Symond’s Inn, as we find from an old inventory 
of his furniture, some of which was sold in the 
move. In a letter to Miss Clift, dated from the 
College of Surgeons, April 24, 1832, he is anxious 
that she should lend him her assistance in en- 
deavouring to abridge the term that opposes 
