134 



sensory papillae or vibrissae to be distinguished upon any other part of the 

 body in this specimen. 



The Rhinarium. — In the adult the rhinarium is one of the most remarkable 

 features of the animal, and all the adult peculiarities are well established in this 

 specimen. It is curious both in form and extent. The causation and function 



Fig. 7. 



Pliascolarctiis ciiicrciis. 

 Plantar aspect of left pes. 



of this peculiar rhinarium, continued so far caudad in its dorsal part, await 

 solution. The nares are slit-like, and owing to the extreme shortness of the 

 mesial nasal process (columella and philtrum), they are practically confluent m 

 their lower median extremities. Superficially the great lateral nasal processes 



