386 
G. J. DE FEJ ER VAR Y 
den Zähnen ungefähr in einer Ebene liegt, nach vorne sich aber nach innen 
dreht, so dass sie schliesslich, vor dem Turbinale, sich rechtwinklig zu diesen 
gesteht hat, und hier ihre verticale Erhebung über den unteren Kieferrand 
nur sehr gering ist, so bleibt sie bei dem vorliegenden Eossil in ihrer ganzen 
Erstreckung in dieser zu den Zähnen paralellen Lage, ist vorn sehr hoch und 
dehnt sich hier verhältnismässig nur sehr wenig medianwärts aus. Doch be¬ 
findet sich auch hier einegrubige längliche Vertiefung. Die ganze Schnauze 
musste also wohl etwas höher, doch bedeutend mehr zugespitzt gewesen sein, 
was durch die Kürze derselben noch stärker hervorgetreten sein musste.» 
The part of the maxillary bent inwards (ala superior maxillae 
mihi) is present in V. marathonensis as well as in other Monitors, but 
being more distinctly separated from the lower and median portion of this 
bone, W eithofer in his description considered only the parts situated under 
the ala superior maxillae, a part of the latter being equally occupied by the 
excavatio nasalis. He also recognizes the presence of a «grubige längliche 
Vertiefung». I should like to suggest the possibility of the ala superior of 
Weithofer’s specimen being incomplete, its upper part broken and lost, 
the lower part alone visible and separated by a furrow formed by the outer 
edge of the excavatio nasalis ; this outer edge is very strongly marked in 
some species, as for instance in old specimens of V. niloticus L. and 
V. griseus Daud.; the limit between the median portion of maxillary and 
the ala superior is defined on the median portion by a sharp crest, after 
which the ala superior’s exterior part appears as deeply sunken. The sup¬ 
position of a fracture of the ala superior would thus, apparently, 
make Weithofer’s description most comprehensible ; a positive 
statement of the real conditions would naturally necessitate an 
immediate examination of the original type.-specimen. The anterior part 
of the maxillary, is, as might be presumed from Textfig. 8 b , indeed large 
enough, though not larger than in old specimens of V. griseus, so that a 
somewhat thickened snout could be supposed, yet not differing in this 
respect from the recent V. griseus ; the strong crista nasalis 
(mihi) 1 ends about at the first third of the maxillary, and owing to this 
the transition between its convexly rounded median part and the ala 
superior seems to have been a more gradual One. The teeth are pointed, 
curved backwards, bearing distinct furrows at their basal parts ; they 
may have been between 10 and 18 in number. 
The Csarnóta fossil (Pl. II, Fig. 1) consists but of a very frag¬ 
mentary portion of the left maxillary incompletely representing about the 
1 See for this terminology the figure representing the maxillary of f V . dirus 
de Vis (Textfig. 16 ). 
