62 EDWARD A. WILSON. 
In the skull of this young specimen the most prominent teeth in the upper jaw 
are the two incisors on each side, and they are almost twice the size of the correspond- 
ing teeth in an adult female. The third or outermost incisor only just shows through 
the gum, and this is one of the permanent set, for just anterior to its emerging point 
on each side may be seen the small socket for the deciduous tooth closed over by the 
gum. When this was opened up by dissection, a minute third incisor of the milk 
dentition was found embedded in it. There are therefore on each side three incisors of 
the milk dentition in the upper jaw, the two central being larger than those which 
follow of the permanent set, and the third minute. The canines of the milk dentition 
are next in prominence to the incisors. Each of these has a long conical crown 
extending 10 mm. beyond the gum, straight and pointed. Next to these, and towards 
the median line, if the gum is dissected away, the points of the permanent canines 
can be disclosed. 
The first pre-molar is the largest and most prominent tooth in the upper jaw. 
Next to it comes a tooth, the point of which has but just pierced through the gum. The 
third is more advanced ; the fourth, again, is just showing through the gum; the fifth 
post-canine, or first molar, shows two of its three cusps, the central and the posterior, 
through the gum, and the second molar was completely hidden in the gum, until 
disclosed by dissection. All these are teeth of the permanent dentition, the cheek 
teeth of the milk dentition, mere caps of dentine in the surface of the gum, having 
dropped from their hold in the lower jaw, though some of them still remain in situ 
in the upper jaw. As to their number no definite statement can be made from 
the specimen, though the position of the few that remain makes it probable that 
there are four pre-molars in either jaw. In the lower jaw again, when compared 
with the lower jaw of a young adult, the inner tooth of the two incisors of the 
milk dentition is considerably larger than the permanent tooth which follows it; in 
shape and character the inner of the two deciduous incisors is almost the exact 
counterpart of the outer of the two permanent incisors, whereas the outer of the two 
deciduous incisors is much like a small edition of the permanent canine. The inner of 
the two permanent incisors again is a small and insignificant tooth resembling neither 
of the deciduous incisors. The canine tooth of the milk dentition is in situ on each 
side in the lower jaw, and has a long and pointed cylindrical crown 8 mm. in length. 
Just within and slightly behind it can be found deeply imbedded in the gum the point 
of the permanent canine. Behind this is the most prominent tooth in the lower jaw, 
the first permanent pre-molar with a large central and a minute anterior cusp. Just 
behind it can be seen two minute sockets in the gum from which the small deciduous 
teeth have quite recently fallen. Posterior to these the central cusps of the second, 
third and fourth pre-molars are just appearing through the gum. On the outer side of 
the fourth on the right side is a small depression for a milk tooth recently lost, and on 
the left side this milk tooth is im situ. The central cusp of the single lower molar is 
just beneath the surface of the gum. 
