BY C. W. DE VIS. 



77 



intention to throw the sexes into separate tables was abandoned 

 when it was found that although the mean size is less in the 

 female than in the male, individual exceptions are so frequent 

 and pronounced that such separation would afford no guidance in 

 an attempt to discriminate between the sexes of the fossils. 



All measurements are in millimetres. 



LENGTH OF CHEEK TEETH. 



WIDTH OF FORE LOBE OF M.3 



M. 



H. 



giganteus 



rohustus 



rufus 



parryi 

 ,, agilis 

 ,, ualahatus 

 ,, dorsalis 

 ,, thetidis 

 ,, coxeni 

 ,, ruficollis 

 ,, irilcoxi 

 ,, stigmaticus 

 O. frenata 

 P. iJf.nicillata 



6-9 .. 

 7-0 .. 

 8-0 . 

 5-4 .. 

 5-7 .. 

 60 . 

 4-9 .. 

 4-4 .. 

 4-5 .. 

 57 .. 

 4-6 .. 

 47 .. 

 4-1 .. 

 4-5 .. 



8-9 ... 

 8-0 .., 

 8-5 .. 

 6-9 .. 

 7-2... 

 71 ... 

 60 ... 

 5-4 ... 

 50 ... 

 7-2... 

 4-6 ... 

 4-9 ... 

 4-3 ... 

 5-5 ... 



44 

 9 

 4 



38 



19 

 5 



41 



13 

 7 



31 

 2 

 2 

 2 



44 



