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Perameles nasuta. 
The specimens were too old to show any traces of the premilk 
dentition, which according to LECHE (5) Prof. WıLson of Sydney has 
discovered in this form, but as in the last genus strong lingual de- 
velopments of the dental lamina representing germs of the undeveloped 
successional teeth were present in connection with most of the ante- 
molar teeth. 
Phascologale (Autechinus). 
The following premilk teeth were present in the single specimen 
which I have examined, those enclosed in brackets were represented 
by labial outgrowths of the dental lamina only, the others by calcified 
teeth ayy 
1) (2) 3 (4) 1 
1. 8 Bhs 5 C. 1 
The first lower incisor is evidently wanting in the adult but a 
slight swelling of the dental lamina is visible during development; 
- has also been suppressed but in the young a small calcified pre- 
milk is present above and below. The adult incisors being 
yp i248 
Tas 
There is an enormous gap between pm ı and pm 2 both above and 
below, this is bridged over by the dental lamina, which shows a slight 
indication of being swollen, this probably represents THOMAS’ missing 
pm 2, the adult premolars being the 1st, 3rd and 4th. The successor 
to dpm 4 develops in front of that tooth. 
The paracone above and the protoconid below develop before any 
of the other molar cusps. 
The relation of the premilk to the incisor teeth and to one an- 
other is very complex in this form and needs renewed investigation 
by means of older and younger stages, in the case of the 1st and 2nd 
lower incisors we find what appears to be two earlier sets of teeth. 
Dasyurus. 
I have examined a number of pouch specimens of two species of 
this genus (viz D. maculata and D. viverrina), and together they form 
a connected series of 5 stages. 
In all of these traces of a dentition preceeding the functional set 
was observed together with certain teeth which are wanting in the 
adult dentition. 
The following is a brief summary of the most important facts 
observed which are represented in a schematic manner in the an- 
