188 DEE TE OF AAR DRVARK CHAP. 
Thomas! there are seven milk teeth on each side of the upper 
jaw (limited to the maxillae, and thus not incisors). An eighth 
tooth was discovered on one side of one of the specimens examined 
by Thomas. In the lower jaw there are only four milk teeth on 
each side. It is interesting to note that the histological structure 
Fic. 108.—Section of lower jaw with the teeth of Orycteropus. x2. (After Owen.) 
of these milk teeth agrees with that of the permanent teeth. 
There are two species of this genus found in Africa: the southern, 
O. capensis, 18 more hairy than the northern, O. aethiopicus. 
O. gaudryi is a Pliocene species from the Island of Samos and 
from Persia, described by Dr. Forsyth Major and Dr. Andrews.’ 
It closely resembles the existing O. aethiopicus. 
Of the Scaly Anteaters, Group SguaMATA or Manidae, there 
is really but one genus, though Phatagin, Pholidotus, Smutsia, 
and Pangolin have been used to distinguish various forms. The 
genus Manis is African and Oriental in range. Dr. Jentink, who 
has lately revised the species, allows seven.” The external form 
of these animals is fairly well known, the remarkable scales dis- 
tinguishing the Pangolins from other animals. Between the 
scales he hairs, which seem to be absent in the adults of the 
African species, though present in the young, thus affording a 
convenient method of distinguishing the Ethiopian from the 
Oriental forms. The scales have been compared to agglutinated 
hairs. That they are not “merely mimetic of the Lizards’ scales ” 
is held by Weber,’ who compares them directly with those struc- 
1 Proc. Roy. Soc. xlvii. 1890, p. 246. 
2 Proc. Zool. Soc. 1893, p. 239, and 1896, p. 296. 
> «Revision of the Manidae in the Leyden Museum,” Notes Leyd. Mus. iv. 1882, 
p. 198. 
4 Weber, Zool. Ergebnisse einer Reise in Niederl. Ost Indien, 1892. See also 
Romer, in Jen. Zeitschr. xxxi. 1896, p. 604, and Reh, cbid. xxx. 1895, p. 187. 
