PROM THE CAPR OF GOOD HOPE. 193 
incisors, precede the fourth, which by its size and shape is called the 
“anterior canine ;” but the first of the incisors is relatively larger 
than in Tvtanosuchus. In Crocodilus bombifrons it is almost as large 
as the fourth or canine tooth ; and, by its superiority in size to the 
second and third incisors, might merit the name of an anterior 
canine. In Crocodilus vulgaris the first tooth is not so large, rela- 
tively, as in Crocodilus bombijrons, but is larger relatively than in 
Titanosuchus. 'The second and third incisors are relatively smaller 
than in 7%tanosuchus and are placed wider apart. It must be noted, 
however, that the section exposing this part of the dentition of 
Titanosuchus (Pl. XI. fig. 6) crosses, not the crowns, but the im- 
planted parts of the teeth. Still such part of root would bear a 
proportion to the crown which suggested the above comparison with 
the broad-faced Crocodilia. 
Beyond the canine (ib. ¢) were indications of teeth of smaller 
relative size than those in Crocodilus vulgaris. Making a horizontal 
section at the requisite lower level, the crowns of three such molars 
were brought into view (fig. 6, m1, m2, m3). 
A portion of a left mandibular ramus, 5 inches in length, was 
found to fit so well to the fractured end of the fossil just described 
as to show it to be part of the same dentary element. In this sup- 
plementary portion were exposed, by a similar horizontal section to 
that which brought to view the preceding molars, a series of 
seven such teeth (fig. 7, m 4-10) showing little difference of size 
amongst themselves. Their alveoli opened upon a horizontal border, 
and their arrangement showed as little lateral as of vertical deviation 
from a straight line. All these teeth are situated close to the inner 
alveolar wall or inner side of the upper border of the jaw, leaving 
an extent of the outer part of that border of from 6 to 12 millims. 
in breadth. 
The first socket of this series (fig. 6, m1) is 10 millims. behind 
that of the canine; the second, in 2,1is but 13 millim. from the 
first ; and the third is 2 millims. from that of the second. The next 
interval is 3 millims. in extent; then follow intervals varying from 
4 millims. to 10 millims. The roots of the anterior teeth show, in 
transyerse section, an elliptical form, with the long axis parallel to 
that of the jaw; those of the posterior teeth are circular in section, 
or nearly so. 
The diameters of the fourth molar are 9 millims. and 6 millims. ; 
the eighth and ninth molars are circles of 7 millims. in diameter. 
Thus was obtained evidence of the concurrence of dental cha- 
racters in the lower jaw with those exemplified in the portions of 
upper jaw (figs. 1 & 2) of Titanosuchus. The osteological differ- 
ences above specified between the symphysial and the dentary 
element of the present genus and that of the Crocodilia compared 
might not have been regarded as of ordinal value; but the number 
and near equality of size of the inferior incisors of Titanosuchus 
would haye suggested its affinity to some genus less differentiated in 
Triassic times from the later and true Crocodilia, if the number, 
