SOME OBSERVATIONS ON ANTARCTIC CETACEA. 



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4. BALSENOPTERA BOREALIS : 



Balsenoptera borealis, Lesson. 

 Balsenoptera laticeps, Gray. 



(The Seihval, or Rudolphi's Rorqual.) 



5. MEG AFTER A BOOPS : 



Balsena boops, Linn. 



Balsena longimana, Rudolphi. 



Megaptera boops, Van Beneden and Gervais. 



(The Humpback, the Hunchback, or Long-armed Whale.) 



6. HYPEROODON ROSTRATUS : 



Balsena rostrata, 0. H. Miiller. 

 Hyperoodon B'utskopf, Lacepede. 

 Hyperoodon bidens, Fleming. 

 (The Bottlenose Whale.) 



7. ORCA GLADIATOR : 



Delphinus orca, Linn. 

 Orca gladiator, Gray. 



(The Grampus, Killer Whale, or Sword Fish.*) 



The Sperm Whale or Cachalot (Physeter macrocephahis), though captured more 

 recently at South Georgia, was not seen either by the Balaena or the Scotia south 

 of the fiftieth parallel of latitude. It is interesting to note that all the sperm whales 

 captured at South Georgia have been males except one (vide SALVESEN, "The 

 Whale Fisheries of the Falkland Islands and Dependencies," PI. X., Vol. IV., Part 

 XIX.)- Besides whales, black fish and porpoises of doubtful species were recorded, 

 and one especially, seen frequently in the vicinity of the Falkland Islands and 

 in Stanley Harbour, appears to be of considerable interest. 



Cetacea observed South of 50 Latitude on board the " Balsena." 



* The term " sword fish," though confusing, is the usual name given to the northern grampus hy British and, 

 I believe, American whalers. 



