DEVELOPMENT AND SUCCESSION OF TEETH IN PERAMELES, 501 
associated tooth-germ, is shown in fig. 59. Behind the canine 
the lamina is abruptly shortened, and is continued after a 
short interval into the bell-shaped enamel-organ of p+, whose 
papilla is destitute of any dentine cap. 
The differentiation of the residual dental lamina has set in 
by the lingual side of the enamel-organ. 
The second premolar exhibits a condition precisely similar 
to that of the first, except that the faintest trace of a dentinal 
cap to the pointed papilla may be observed. The residual 
dental lamina is fairly developed. 
Behind p2 the dental lamina becomes gradually larger on 
cross-section, the germ of dp= soon appearing in the coronal 
series. By the side of the latter tooth the dental lamina 
exhibits precisely the same kind of modification as was seen in 
the preceding stage in the corresponding situation (cf. fig. 49). 
Fig. 50 shows a horizontal and fig. 60 a coronal section of 
the structures concerned. It will be noted that in this stage 
also the relative development of dp* is considerably retarded 
as compared with that exhibited in earlier stages. Its dental 
cap is only a trifle in advance of that of p2. From its present 
condition alone it would be quite impossible to arrive at that 
conclusion with regard to its serial homology which we find 
it necessary to adopt in view of the earlier characters, both of 
the tooth itself and of the rest of the dentition. 
In the molar region the connection of the dental lamina 
with the oral epithelium is frequently interrupted. 
The first two molars are large and well developed. Lingually 
from each there is a large and well-developed residual lamina 
comparable to that figured for the last stage. The Anlage of 
the third molar is slightly more bulky than in Stage rv, but 
is still represented by a mere distal swelling of the lamina, as 
represented in fig. 61. In this figure the projection marked 
‘cb. m2” is seen by comparison with the anterior sections to 
correspond to the root of the laminar connection (“ Ver- 
bindungsbriicke”’?) with m2. 
Lower Jaw.—The dental lamina in front of the region of 
the first incisor shows some further antero-posterior extension 
