CONTENTS. 



PAG 



Fourth Genus. NARWHALUS . . . . i8'2 



The Narwhal, or Sea Unicorn. Plate XI. . . 18-2 



Fifth Genus. DIODOSS, or Two-toothed Whales . 191 

 Two-teethed Whale of Desmarest. 



Diodon Desmarcsti . . . . * 191 

 Two-teethed Whale of sowerby. 



Diodon Sowerbi. Plate XII 1.92 



Sixth Genus. HYPEROODONTES . . . . 194 

 Bottle-nosed Whale of Hunter. 



Hyperoodon Honfloriensis. Plate XIII. . . 194 



Seventh Genus. AODONS. Toothless Whales . J98 

 Toothless Whale of Havre. 



A.Dalei. Plate XIV 198 



Eighth Genus ZIPHIUS (Fossile) . . . '201 



Ziphius Planirostris 201 



The DELPHINI^E (with teeth in both jaws) . 202 



Ninth Genus BELUGA 204 



White Whale. 



Beluga. Plate XV 204 



Tenth Genus. DELPHINAPTERUS (Dolphin without 



dorsal fin) 210 



Delphinapterus Peronii. Plate XVI. . . . 210 



Eleventh Genus GLOBICEPHALUS . . . 212 



The Deductor, or Casing Whale. 



Globicephalus Deductor or Melas. Plate XVII. . 212 

 The Globiceps of Risso. 



Globicephalus Rissii. Plate XVIII. ... 219 



Fossile Globiceps 220 



Twelfth Genus PHOCJENA . . . . 222 



The Common Porpoiae. 



Phocama Communis. Plate XIX. Fig. 1. . . 222 

 The Porpoise of the Cape of Good Hope. 



Pkoc&na Capensis. Plate XIX. Fig. 2. . . 227 

 The Grampus. 



Ptocana Grampus. Plate XX. ... 228 



