ILLUSTRATIONS. 



Plate 



I. 



IL 



III. 



IV. 

 V. 



VI. 



VII. 



VIII. 



IX. 



X. 



XL 



XII. 



XIII. 



XIV. 



XV. 



XVI. 

 XVII. 



Balpena mysticetus; Hyperoodon female, skeletons . Frontispiece 

 Balfenoptera sibbaldi, cervical vertebr;e . opposite page 45 



,, sibbaldi, cervical and 1st dorsal 



vertebrte . . . „ „ 46 



,, sibbaldi, bones of pectoral limb „ „ 48 



„ sibbaldi ; Hyperoodon young 



male, skeletons 



,, borealis, skeleton 



,, rostrata, animal from photograpli 



„ mesial surface, right hemisphere 



Sperm Whale, maxillary teeth 

 Hyperoodon, manus ; Platanista, manus 

 Platanista gangetica, manus 



Monodon monoceros, base of brain 



„ outer surface, left hemisphere 



Lagenoi'hynchus acutus, animal from photographs, 



profile and ventral surface 

 Halicore Dugong, adult, front of face 

 Manatus senegalensis, face and pectoral region 



51 

 57 



60 

 65 

 74 

 81 

 94 

 95 

 100 

 100 



128 

 154 



157 



FIGURES IN TEXT. 



Airthrey Carse Whale, back of skull, Balaenoptera 

 Scapula, Carse Whale, Megaptera 

 Mandible of Carse Whale, Orca gladiator 

 Balaena mysticetus, face of fcetiis 



,, „ teeth pulps, fcetus . 



„ „ tympanic bone, adult, outer surface, left 



,, ,, hairs on lijj, fcetus . 



Balsena biscayensis, tympanic bone, left, inner surface 

 Balfenoptera musculus. skull .... 



„ „ tympanic bone, left, outer surface 



Balaenoptera sibbaldi, Longniddry specimen, from drawing 

 „ „ dorsum of head, fcetus . 



,, „ suspensory column of mandible in 



section, fcetus . 



vertical 



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42 



