8 



ARKIV rÖR ZOOLOGT. BAND 7. NIO 10. 



The anterior portion of the ischium is depressed like pubis^ 

 the posterior end is, however, somewhat obliquely compressed. 

 Terminal ly it carries a cartilage in the same way as ilium. 



A rudiment of femur is only present on the left side. 

 It is a somewhat irregiilar ball-shaped ossification with a 



Fig. C. Pelvie bones of Balcenoptera quoyi (Fischer) seen from above. 



cartilaginous covering. The longest diameter is a little more 

 than 5 V-' cm., and its shortest not quite 3 V2 cm. The rudi- 

 mentary femur is by ligaments attached to the lower side 

 of the ilium where it joins with pubis. As the soft parts 

 were not preserved when the bones arrived here, no further 

 details can be given. 



