204 MR. RUDOLF MARTIN ON A FOSSIL [Mar. 3, 
femur (rostral and caudal aspect) at my disposal, on which the 
following description is based. 
Evidently this femur (text-figs. 30, 31) belonged to a large 
struthious bird, as it differs little from the same bone of a modern 
Ostrich, The size of the femur is somewhat larger than that of 
the same bone of recent Ostriches at my disposal, but very probably 
there would be no difference between a large specimen of Struthio 
camelus and the fossil. 
Text-fig. 30. Text-fig. 31. 
+ nat. size. 
Text-fig. 31.— _,, i u a Rostral view. 4 nat. size. 
Text-fig. 30.—Right femur of Struthio karatheodoris. Caudal view. 
The following table gives the results of a comparison between 
the fossil in question and that of a medium-sized modern 
ostrich :— 
Length of Length ofcaput Smallest Width of 
Species. femur. + collum. width. trochlea. 
Str. karatheodoris 36°0 10°5 5D 12:4 mm. 
Str. camelus ...... 31-2 10:0 52 11:5 mm. 
The measurements of the caput + collum have been taken 
