504 J. T. WILSON AND J. P. HILL. 
the teeth are well calcified, and have now attained such size 
relatively to the jaws that, especially in the incisor region, a 
good deal of overlapping occurs in both jaws. 
Further, in Stage v the dental lamina, though frequently 
interrupted and generally exhibiting signs of reduction and 
commencing resorption, was, on the whole, fairly complete. 
In the present stage (v1), on the other hand, the lamina is 
exceedingly imperfect and scrappy ; and even where it appears 
it usually displays much attenuation and irregularity of form 
from the operation of the degenerative process. 
Upper Jaw.—Beside the first incisor of the upper jaw 
only comparatively slight traces of the dental lamina are 
visible, and these are now quite unconnected with either the 
tooth or the oral epithelium. It is impossible to distinguish 
any specific remains of the residual dental lamina as such. 
Beside i2 it is just possible to recognise portions of lamina 
corresponding to ‘ Ersatzleiste” and “Verbindungs- 
briicke” in a few places ; while in the region of 23 no resi- 
dual lamina can be identified. 
The fourth and fifth incisors are now well calcified, though 
smaller than the anterior ones. Their more juvenile character 
is perhaps evidenced by the persistence, in more regular form, 
of the dental lamina with its residual prolongation. But these 
latter also persist to a large extent in connection with the 
canine, as shown in fig. 62 (rdl.), which represents the anterior 
portion of that tooth (and therefore does not show the pointed 
and strongly calcified character of its apex). 
In the region of the anterior premolars the dental lamina is 
scrappy, but vestiges of the free residual lamina remain here 
and there, as well as portions of the rest of the lamina and of 
the epithelial connecting bridge. 
The lamina becomes more regular and complete behind p2, 
and in the region of dp* its marginal portion is swollen, form- 
ing the Anlage of p2 as shown in fig. 63. In adjacent sections 
here and there it exhibits some indentations, but of irregular 
character. In this its swollen portion it is surrounded by 
markedly condensed connective tissue. 
