38 



definite raised margin which obviously represents the aborted 

 structures involved in the formation of the pinna. 



The rhinarium consists of a blunt and pie-like snout at 

 the extremity of which are two rounded narial apertures. 

 The nostrils are situated somewhat wide apart, and their 

 circular orifices open immediately forwards. The narial mar- 

 gins are complete, there being no lateral incisura. The 

 thickening and slight prominence of the dorsal surface of the 



Fig. 4. 



Notoryctes typhlops. 



Plantar aspect of 

 left pes. 



Fig. 3. 

 Notoryctes typhlops. 

 Palmar aspect of left manus. 



rhinarium is doubtless the commencing formation of the rhinal 

 shield of the adult. 



The> mouth is elongated and slit-like. The margins of 

 the lips are separated over a considerable portion of their 

 length. There are in the specimen in its present condition 

 no evidences of the adaptation of the mouth to a nipple. The 

 limbs are short and stout, the free portion of the fore limb 

 being considerably longer than the corresponding portion of 

 the hind limb. 



The manus and pes are of peculiar interest. 



In the manus the enormous, and early, specialization of 

 digits 3 and 4 is remarkable. It is to be noted that, although 



