THE ANNALS 
AND 
MAGAZINE OF NATURAL HISTORY. 
[SIXTH SERIES.] 
No. 22. OCTOBER 1889. 
XXX.—On the Genera Nototherium and Zygomaturus, in 
reply to Mr. Lydekker. 
Queensland Museum, Brisbane, 
May 21, 1889. 
To the Editors of the Annals and Magazine of Natural 
History. 
GENTLEMEN ,— 
Permit me to offer some observations on Mr. Lydekker’s 
view of Notothertum and Zygomaturus. 
For the behoof of those who may be interested in the dis- 
pute I beg leave to place at your disposal a cast of the maxilla 
twice referred to in my remarks *, and to be 
Yours most respectfully, 
C. W. DE Vis. 
In the skull to which it is proposed to restore Macleay’s 
name Zygomaturus are two premolars—the one on the right 
side well preserved and complete though worn, the other, 
taken by itself, in a condition less conducive to safe interpre- 
tation. My. Lydekker, in his late attempt to set aside my 
reasons for separating Zygomaturus trom Nototherium, 
* [The cast has been presented to the Geological Department of the 
British Museum (Natural History).—Ebs. | 
Ann. & Mag. N. Hist. Ser. 6. Vol. iv. 18 
