REPRODUCTION 



353 



P. G. V. Altveer, Master of the Eemland (Royal Dutch Lloyd - 25th 

 September, 1955, off the South American coast between Salvador and 

 Rio de Janeiro), and by Capt. H.J. Stiekel, Master of the Merak J\', who 

 observed courtship in a school of about ten Rorquals at 18° N. and 20' VV., 

 on gth June, 1956. G. Huisken, who served as stoker on S.S. Alolenkerk, 

 reports that, in March 1948, on a journey between Karachi and Aden, he 

 observed some members of a school of about 200 Sperm Whales behaving 

 similarly. 



Scammon (1847), however, described another method of mating, viz. 

 copulation at the surface, bellies lying horizontally. This type of copula- 

 tion, too, has been reported on many occasions, for instance by the crew 

 of the factory ship Balaena, by Hubbs of Californian Grey Whales and 

 Humpbacks, by Burns (1953) of Grey Whales, and by Ruspoli of Sperm 

 Whales (1955). Huey, who saw it twice from about 200 feet away in Grey 

 Whales, reported that the pectoral fins protruded out of the water, that 

 the flukes were submerged, and that each act of copulation lasted for 





k 



2^- 



^^^-7^ 



Figure ig^. Humpbacks mating. {jVishiwaki and Hajashi, ig^i.) 



