526 Dr. C. I. Forsyth Major on the 
Upper jaw: J.d.3 has been shed and its successor is 
in situ; I.d.1 has likewise disappeared, J. 1 not yet com- 
pletely cn sttu ; J.d.2 still present on both sides. P.d. 3 
still rests like a cap upon its successor. Lower jaw: 
I.d.1 has been shed, but its successor has not yet come 
through completely. Z.d.3 has likewise been shed, and 
its successor is in situ; J.d.2 is still present. P.d.3 
has been shed, P. 3 is not yet completely protruded. C-.d., 
P.d.2, and P.d.1 are still in place above and below. 
M. 3 sup. and inf. are nearly tn situ and already partly 
in use. 
Stage VIII. J. 3 almost protruded above, entirely so below. 
Upper jaw: The change of the anterior and posterior 
pairs of 7. has been consummated, and the permanent 
teeth are in situ. J.d.2 is still present on the left side ; 
on the right it has been shed, and J. 2 is beginning to 
appear. In the lower jaw the change of the anterior 
and posterior pairs has likewise taken place, and J. 1 
and J.3 are in situ; J.d. 2 is still present on both sides, 
as are also all four C.d. P.d.3 has disappeared above 
and below, and the P.3 are almost completely in place. 
The posterior milk-premolars (P.d.1 and P.d.2) are 
still present. 
Stage IX. But little further advanced than VIII.—J£3 
sup. is tn situ as well as M.3inf. The only other 
difference from VIII. consists in the fact that Z.d.2 has 
been shed on both sides; J.2 is not yet em situ. The 
tip of C. sup. is visible, én front of C.d.; C. inf. is coming 
into view on the inside of C.d. 
Stage X. The change of the whole of the teeth is accom- 
plished. C.is not yet completely zn situ, and is con- 
sequently the last tooth to be replaced, as also its 
precursor is the last to appear in the milk-dentition. 
Oryzoryctes hova. 
Stage ]. All milk-teeth cm situ. M.1 is almost entirely 
exposed ; J/.2 is beginning to protrude. 
Stage If. Milk-teeth as in I. J.1 and M.2 somewhat 
further advanced, J/. 1 inf. completely in situ. 
Stage III. Z.d.1 and J.d.3 have been replaced above and 
below ; J.d. 2 and likewise C.d. are still in situ. P.d.3 
sup. has been shed on the right, on the left it still rests 
like a cap upon P.3, which is coming into position. 
P.d.1 and P.d.2 sup. and inf. are still in situ. All 
three molars are completely developed and ¢n sétw. 
