On the Teeth in the Centetide. 520 
LXV.—On the Change and Form of the Teeth in the Cente- 
tide, a Malagasy Family of Insectivora. By C. I. 
ForsytH Magor. 
AmMonG the fruits of my two years’ sojourn in Madagascar is 
arich series of recent Insectivora (Centetide), and since a 
considerable time must still elapse before this is completely 
worked out in a monograph *, I now give in a condensed 
shape in the following pages the most essential facts as to 
the change and form of the teeth in the family in question, 
so far as it has yet been possible to render the material avail- 
able for examination. 
Ae 
THE CHANGE OF THE TEETH. 
Oryzoryctes tetradactylus. 
Stage I. /.d.1 and J.d. 3 have come through almost completely ; 
of the remaining milk-teeth the tips alone protrude. The 
C.d. are the most backward. 
Stage II. All milk-teeth protrude from the jaws to their full 
extent, with the exception of C.d., of which the posterior 
basal cusp is not yet visible. J/.1 begins to protrude. 
Stage IIT. Skull somewhat shorter than in II.—AII milk- 
teeth are completely protruded, with the exception of 
C.d. inf., of which the posterior basal cusp is not yet 
visible. ‘lhe greater portion of M.1 is protruded 
Stage 1V. All milk-teeth completely protruded, as also 1; 
M. 2 partly so. 
Stage V. Like IV.; but J/. 2 is further advanced. J.d.3 sup. 
dext. on the point of falling out. 
Stage VI. Skull somewhat longer than in VII. and VIII.— 
M.1 is in situ; MM. 3 sup. and inf. on the point of coming 
through. J.d.1 and /.d.3 sup. and inf. have been shed. 
I.3 sup. and inf. altogether in situ; J.1 sup. not yet 
completely so. J.1 inf. is more backward on the right 
than on the left. .3 (Hens.) is commencing to raise 
Pda: 
Stage VII. Skull a shade longer than that of VIIJ.—M.3 
sup. is somewhat further advanced than in the latter, 
M. 3 inf. somewhat more backward. In the change ot 
teeth VII. is somewhat less further advanced than VIII. 
* The diagnoses of most of the new species have already been pub- 
lished. Cf. Ann. Mag. Nat. Hist. ser. 6, vol. xviil. 1896, pp. 318-322, 
461-462. 
