THE BRAIN OF THE ‘ARCHZOCETI.’ 
By Gi EcLon Smite; MSA. M.D, 
Fellow of St. John’s College, Cambridge; Professor of Anatomy, Egyptian 
Government School of Medicine, Catro. 
{A paper read before the Royal Society of London, February 12, 1903. ] 
So far as I have been able to ascertain, nothing whatever 
is known of the form of the brain or, more strictly, of the 
cranial cavity in the Archzoceti. Hence no apology is 
needed for presenting even this imperfect account of two 
cranial casts representative of this sub-order, which have come 
into my hands. 
Among the Eocene remains found in the Fayim region of 
the Egyptian desert by Mr. H. J. L. Beapneri and Dr. 
CHARLES W. ANDREwS, in Igol, there was a broken skull of 
Zeuglodon,* from which it was possible to obtain a mold, repre- 
senting the form of the greater part of the dorsal and lateral 
aspects of the brain. A plaster cast was made in the British 
Museum at the instance of Dr. ANDREWws, who kindly placed it 
at my disposal for description. 
In the following winter (1902), Mr. BEADNELL found in 
the same locality a natural cranial cast of the same size and 
general form as the artificial cast of Zeuglodon. It is obvious 
at a glance, if the two specimens be placed side by side, that 
the natural mold belongs to some member of the Archzoceti, 
1 These notes were originally intended for the Report on the Survey of the 
Fayfim, to be issued by the Egyptian Survey Department, and are now pub- 
lished separately with the permission of the Under Secretary of State for Public 
Works and Captain H. G. Lyons, Director-General of the Survey Department. 
2 C. W. ANDREWS, “‘Extinct Vertebrates from Egypt,” Part II. (Extracted 
from the ‘Geological Magazine,’ N. S., Decade IV, vol. 8, I901, p. 437,— 
Zeuglodon Osiris, Dames’.) 
