BY H. H. SCOTT AND CLIVE E. LORD. 



Pseudorca crassidens. 

 Comparative measurements of the Tasmanian and 



North Sea specimens. 



SI,eUfi)U.<. — 



ORCA GLADIATOR. 



(prca capensit.) 



Plates II., III.. IV., V., VI., VII., VIII. 



Fcr detailed synonymy see: — 



Gray, B.M. Cat. Seals and Whales (1866), p. 278-290. 



The prevailing opinion seems to favour the reduction 

 of the representatives of this genus to one species — Orra 

 gladiator. We have adopted this view and made Orra 

 capenxis a synonym of Orra (jladiator. Should, however, 

 rapensis be again raised to specific rank we are of opinion 

 that the Tasmanian forms should be included, as they 

 appear to have the characters at one time allotted to 

 rajitnsts in order to separate it from ijladiator. We formed 

 this opinion after comparing the Tasmanian skulls with the 

 figured ones of Orrti rapenxia reproduced by Gray in the 

 Zoology of the Vovage of the Erebus and Terror. (Plate 

 IX.) ^ ^ 



Unfortunately portions of the skeleton examined by 

 us had disappeared. This is greatly to be regretted, es- 



(10) In this articulated skeleton (Plate I.), the intervertebral pads are 

 thiek. in fact exceptionally so, and if this excess is allowed for, 

 the two skeletons are of almost similar length. 



