TRIASSIC FISHES FROM SPITZBERGEN 
15 
considerably out over the root and formed with this a rather marked notch. The basal 
surface of the root is oblique and faces ventero-laterally. Both the root and the crown 
seem to have been somewhat bent in the usual way, so that, seen from the medial or 
the lateral side, their basal contour was concave and the distal contour convex. 
The tooth P. 98 i greatly resembles in all essentials P. 98 h, as is seen in PI. 2, 
fig. 14, but the transversal crista is coarser, as are its ramifications too, and the striae 
on the lateral side of the primary longitudinal crista have their distal ends curved 
towards the slightly indicated principal cone and seem to have formed a secondary 
longitudinal crista, although this is now in a bad state of preservation. 
The tooth P.p8k (PI. 5, fig. 15) has the principal cone marked only by a distinct 
angle that is clearly seen both from the medial and the lateral side. A transversal 
crista is situated above this angle in about the same way as in tooth P. 98 h. There is 
a primary longitudinal crista clearly developed as usual, and besides this there are 
two secondary longitudinal ones present, both situated laterally of the primary one. 
The one of these two that lies nearest the primary one is the longest and strongest. 
The position and extension of all the longitudinal cristae and their relation to the 
transversal crista are clearly shown in PI. 2, fig. 15 a. In other respects the sculpture 
has the usual character and the striae on the medial side reach from the basal margin 
of the crown to the primary longitudinal crista without interruption. On the lateral 
side they are also uninterrupted and near the transversal crista they run for some 
distance together with the lateral one of the two secondary longitudinal cristae; farther 
from the transversal crista, on the other hand, they join the medial one of them. The 
three longitudinal cristae have between them two sculptureless longitudinal grooves, 
whose extension and position is clearly shown in PI. 2, fig. 15 a. Otherwise with regard 
to the crown it is only necessary to mention that it is obviously somewhat bent in 
the usual way. 
The root is very incompletely preserved and its conditions are rather uncertain 
in many respects. 
The tooth P.98 1 (PI. 2, fig. 16) is very fragmentarily preserved as there now 
remains only a portion of its middle part. There is no sharp angle present, as was the 
case on the three teeth just described. A transversal crista is evident, however, but it 
is ramified both at its medial and lateral end rather close to the primary longitudinal 
one and consequently seems strikingly short. Its ramification is most abundant at the 
lateral end. -— A cross section through this tooth is seen in text fig. 4 E. 
The axis of height through the crown seems in its prolongation to have met the 
basal surface of the root almost at right angles. 
Another tooth that shows great agreement with P. 98 1 is P. 98 VI (PI. 2, fig. 17). 
Both the crown and the root seem on this tooth to have been bent in the vertical 
plane through the axis of length in the usual way, although not particularly strongly. 
A primary longitudinal crista is clearly developed, whereas the transversal one seems 
to have not been prominent, owing to its abundant ramification even in the immediate 
neighbourhood of the former. The striae are somewhat more feeble on the lateral side 
of the crown than on the medial one and have their distal ends distinctly curved 
towards the transversal crista, so that long pieces of them run parallel to the primary 
