THE MOUTH 479 
The formula for the temporary teeth is: 
3 1 stN 
2 Di—De-Dp ) 32 
3 1 } 
The upper incisors are small; they are separated from each other by spaces, 
and from the canines by a larger interval. The first incisors are the largest; they 
are flattened and strongly curved, and the crowns are convergent; they have no 
distinct neck. The convex labial surface has an extensive covering of enamel, but 
the latter covers only a small marginal area on the lingual surface. The second are 
much shorter and are only slightly curved; they have a short flattened crown and 
a rounded root. The third incisors are much smaller, are 
flattened laterally, and have three small eminences on the Cement Enamel Dentine 
crown. The lower incisors are almost horizontal and are 
convergent and close together. The first and second are 
about equal in size, are rod-like, very slightly curved, and 
deeply implanted in the jaw. The labial surface is slightly 
convex, the lingual concave and marked near its extremity 
by a ridge. The third incisor is much shorter and is some- 
what flattened; it has a short narrow crown and a distinct DPS 
neck. SN NAS 
The canine teeth or tusks of the male are greatly de- 
veloped and project out of the mouth. The upper canine of the boar may be three 
or four inches (ca. 8 to 10 cm.) long. The crown is conical and is curved some- 
what backward and outward; the embedded part is curved and has a large pulp 
