PLATE 4. 



Skull C. 



Skull D. 



Fig. I. 



Fig. I c. 

 All the figures reduced to half of the natural size. 



Fig. I. Skull C. Mr. Rowland Ward's Specimen, purchased by 



Fig. la, b, c. Top, lateral and basal view of the pair of rudimentary 



Fig. 2. Skull D. Mr. Boyd Alexatider's specimen presented to i 



B. M. 

 ossicones. 

 3. M. 



Fig. 2. 



