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SPECIMENS OF CETACEA. 





II. DELPHINAPTERUS. (Dpt.) 



Delpliinapterus, Laeepede, Hist. Nat. Cetacees, 1804. 

 Beluga, Gray, Spic. Zool., 1828. 



Teeth, eight to ten in the anterior part of each jaw, 

 truncated when worn ; premaxillse flat or faintly 

 concave in front of nares. Forearm and manus 

 short, broad ; no dorsal fin. 



(1) DELPHINAPTERUS LEUCAS. (DPT. L.) 

 (Beluga or White Whale.) 

 Physeter catodon, Linnceus, supra cit. 

 Delphinus leucas, Pallas, Reise, 1776. 

 Balsena albicans, Milller, Zool. Dan. Prodr., 1776. 

 Beluga catodon, Gray, Zool. Erebus and Terror, 1846. 



Colour white; 16 to 20 feet long; cervical vertebras 

 not fused, formula C^D^^ ov ^J^QCd^^= 50 or 51 ; neck 

 distinct on surface. 



Skull, adult, length 20 inches, breadth 11 inches; beak, 

 length 10^ inches, breadth 7 inches. Nasal end of 

 premaxillaries almost flat, comparatively thin ; If 

 inch broad in line with base of beak, convex, and 

 retaining convexity until near tip. Superior maxillae 



