6. MACLEAYIUS. 45 



5. CAPEREA. 



Caperea, Qray, I. c. pp. 78, 101 ; Synops. Whales §• Dolph. p. 2 ; Lill- 

 jebory, N. Acta Upsal. vi. 1867. 



First rib ? Baleen ? Tympanic bones irregular, 



rhombic ; aperture irregular, much contracted at the upper end ; 

 the wide part not half the length of the bone. " Cervical vertebra) 

 all united. First rib single at the upper, and very broad at the 

 lower end. Bladebone (acromion) rudimentary. Coracoid process 

 none." — Lilljeborg. 



Vertebrae 55; the seven cervical all soldered by their bodies, and 

 the spinous processes of the first five united into a single crest, and 

 of the two last into a separate crest ; each has a distinct upper lateral 

 process and, except the seventh, a distinct lateral process. Upper 

 lateral process of the atlas narrow, square, reflexed, and bent up- 

 wards ; lower one thick, enlarged, and rounded at the end (Osteogr. 

 Cet. t. 3. f. 4, 5). Scapula with only a slight ridge in the place of 

 the acromion (Osteogr. Cot. t. 3. f. 7). Carpus cartilaginous, with 

 five small bones. Skull with a slender arched beak. Lower jaw 

 subcylindrical, thick near the condyle, rather attenuated in front. 



The first rib is very narrow above, and gradually becomes very 

 broad below and deeply notched on the lower edge, which embraces 

 nearly the whole length of the sternum ; upper end with a single 

 head. Second rib equally large at the free end, and not notched. 

 Phalanges 1,4,5,4,3. 



I believe that the " bonnet " of the Sandwich-Islands whalers is 

 only the "topknot" of the old male whale of this genus, or of a 

 nearly allied species. 



1. Caperea antipodarum. B.M. 



Caperea antipodarum, Gray, I. c. p. 101, f. 9; Synops. TMiales Sf Dolph. 



P- 2 - 

 Balaena australis, Desm. Diction. 



Balama antipodarum, Van Ben. OsUoyr. Cet. p. 46, t. 3 ; Gray, Dief- 



fenbach, t. 1. 



Inhab. New Zealand. Skeleton, Mus. Paris. 



The seven cervical vertebras are completely soldered by their bodies ; 

 and the first five spinal apophyses form a continuous crest, and the 

 two last form a separate crest (Osteogr. Cet. t. 3. f. 4, 5). The 

 petrous portion of the skull short, small. The bladebone longer 

 than broad, with only a slight indication of a process on the front 

 edge. Upper lateral process of the axis square, bent back ; lower 

 process rounded at the end and prominent. 



6. MACLEAYIUS. 



Macleayius, Gray, I. c. pp. 103, 371 ; Syno2)s. Whales $- Dolj-h. p. 2. 

 Cervical vertebras united into a single mass ; upper lateral process 

 of the atlas very broad, compressed, occupying the greater part of 

 the side, truncated at the end. Lower margin close on the lower 



