8 ON THE SYSTEMATIC POSITION OF ZEUGLODON. 
that, in my opinion and so far as my knowledge goes, all that has been done, the 
researches of M. GmRvAIS* on the brain-cavity of Zeuglodon, all the other bones 
that various authors have figured, all these various researches contain no facts which 
deserve to be chronicled as opposing the conclusion at which I have arrived. 
But, it may be asked, if the case be really so clear as from the foregoing con- 
siderations it appears to me, how comes it that so many eminent anatomists have all 
along supported a contrary opinion? I fancy that this arises mainly from the 
circumstance that fifty years ago, when the Zeuglodons were discovered and much was 
written regarding them, the notions concerning the Cetacea were vague and incom- 
plete. That order not only included the Sirenia, but was in many minds closely 
linked with, if it did not comprise, the Pinnipedes as well: that, in short, when 
JOHANNES Miuuer called the Zeuglodons Cetacea, he used the word in a very 
different sense to ours.t And, finally, that since that time few discoveries, com- 
paratively speaking, of Zeuglodont remains have been made to call fresh attention 
to the group. 
* Gervais. Formes cérébrales propres aux Thalassothériens. J. de Zool. II1., p. 570. 18797 
+ Compare, for instance, the following passage from Branpr (Symbole strenologice, III., p. 333): 
“ Formerly I was of opinion that the Zeuglodons formed a separate order of the Cetacea, eguzvalent to the 
Sirenia and to the Delphinoidea together with the Balenoidea; and were rather intermediate between 
Cetacea and Sirenia, than between Phocide and Cetacea. Later researches induced me to unite the 
Zeuglodontia with the Delphinoidea,” e¢ seg. And similarly Jonannes MUuter says (loc. cit. pp. 5 and 31), 
that “the Zeuglodons are intermediate between the Seals and Cetacea, but within the order of the Cetacea.” 
