
1891.] Notes on Mesozoic Mammatia. 615 
evidence of this, as every one familiar with similar specimens 
knows. 
‘Notwithstanding this inexcusable mistake, Prof. Osborn. ven- 
tures to assert in his review that a tooth, which I described and 
figured as a molar of a mammal, Stagodon, has but a single fang, 
does “not resemble the teeth of any known mammal,” and that 
the genus was “ founded upon reptilian or ichthyopsidian teetlf.” 
I distinctly stated that this tooth has two fangs, and the bases of 
these were indicated in one of my figures. Moreover, several 
well-preserved specimens since obtained show two distinct roots, 
and other features which prove these teeth mammalian beyond 
doubt. 
In his Mesozoic Mammalia (p. 221) Prof’ Osborn describes and 
figures as a premolar a specimen which is now almost certainly 
known to pertain to a fish, and not to a mammal, I have a very 
similar specimen from the same locality, which is pronounced the 
same species by those who have examined both. This I pur- 
chased many years ago of a well-known collector in Stuttgart, 
who called it a mammal tooth. When investigating Mesozoic 
mammals later, I examined this specimen with care, and found it 
to be made up of two portions of fish teeth (Hybodus) neatly 
cemented together, making four cones on a quadrate base, as in 
the fossil Prof. Osborn so carefully described. ‘A friend who saw 
my specimen here has since sent me from Europe drawings of a 
third supposed mammal tooth from the same locality (Diegerloch), 
which he considers the same as mine. The drawings are charac- 
teristic, and indicate another specimen of apparently the same 
sort. Others are probably in existence, as the demand for Meso- 
zoic mammals is great, and the supply has hitherto been limited. 
One or two points more should be mentioned about Prof, 
Osbern’s work on Mesozoic mammals: namely, his habit of 
replacing, on insufficient grounds, scientific names, especially 
those of families and genera, by other names of his own; also, 
using the figures of other authors without the usual credit. As 
an example of the latter, I may cite this use of no less than five 
__ of my figures of Jurassic mammals, in his memoir on Mesozoic 


