148 LIFE OF FLOWER 



spermaceti ; these being often blended with the products 

 of the cachalot, from which they are distinguishable by 

 their specific gravity. In his 1882 paper Flower 

 described a water- worn bottle-nose skull from Australia, 

 which he regarded as indicating a second species of the 

 genus Hyper oodon planifrons. The correctness of this 

 determination has been demonstrated by complete 

 skeletons of the same whale from the South American 

 seas. 



The last two papers on Cetacea by Sir William in the 

 Proceedings of the Zoological Society refer to the occur- 

 rence of examples of Rudolphi's rorqual (Bal&noptera 

 borealis) on the English coasts. In the one paper he 

 described a specimen stranded on the Essex shore in 

 1883, and in the other an example captured in the 

 Thames four years later. 



As regards other contributions to our knowledge of 

 the Cetacea, Sir William in 1883 delivered before the 

 Royal Institution a lecture on " Whales, Past and 

 Present," which is reproduced in the Proceedings of 

 that body for the same year. A second lecture, " On 

 Whales and Whaling," was delivered before the Royal 

 Colonial Institute for 1885, and is published in the 

 Journal of the Institute for that year. The article 

 "Whale," for the ninth edition of the Encyclopedia 

 Britannica, is also the work of Flower ; it is reproduced, 

 almost as it stands, in the Study of Mammals. 



The year 1885 saw the publication of the "List of 

 the Specimens of Cetacea in the Zoological Department 

 of the British Museum," a small, but nevertheless 

 valuable work, from which an extract has already been 

 made. Even when this was written, the museum con- 



