60 



MAMMALIA. 



fin more or less large upon tlie back, and longitudinal wrinkles on 

 the lower part of tlie body. Fig. 18 rejjresents a species of Rorqual, 

 whose skin, perfectly preserved under a roof, and protected by 

 railings, occupies a large yard in tbe Jardin des Plantes at 

 Paris. 



Whales projocrly so called have the head very large, about one- 

 third of the entire length of the animal, and considerably arched, 

 the back unprovided with a fin, and the lower parts of the body 

 smooth or unwrinlded. 



Dr. Gra^', of the British Museum, distmguishes four .species of 

 Plight Whales — viz. the ]*forthern Whale [BaUena mijaticetus), the 



IS.— Kurqiuil (J''/it/s'iIu£ autlqjiorii/u). 



Western Australian ^Tliale (B. inanjuHifa), the Cape "\^Tiale {B. 

 Aitsfralis), and the Japanese Whale (B. Japonica). He also divides 

 the Eorcpial series — which have a prominent and conspicuous fin 

 upon the back, the plates of baleen or whalebone short and broad, 

 and the belly longitudinally plaited — into Megapfcra, with the 

 flilDpers elongated and dorsal fin low; Bakenoptcra, with flippers 

 of moderate length,, the dorsal fin falcate, and situate two-thirds 

 of the length of the animal backwards, vertebra: 46 or 48 ; and 

 Plnjmlm, with flippers of moderate size, the dorsal fin falcate, and 

 situate further backwards, or at three-fourths of the entire lerio-th 

 of the animal, the vertebras nimibering from 54 to 64. Even 



