140 



DR. J. E. GRAY ON NEW-ZEALAND WHALES. [Jan. 21, 



indicative of a peculiar group, for which I propose the name of Hali- 

 balcp.na. 



The width of the atlas and lateral processes is 28 inches, and of 

 the lower lateral processes and the second vertebra 27 inches, the 

 height to the top of the crest about 16 inches. 



Scapula of Mackayius austraUensis (inside). 



The peculiarity of the genus Halibaleena is that the lateral pro- 

 cess of the atlas is broad and expanded, long at the top, and gradually 

 shorter below, with an oblique descending outer margin (see figure, 

 Cat. Seals and Whales, p. 83, f. 3). The upper lateral process of 

 the second vertebra is broad, united to the hinder margin of the 

 atlas ; the lower process broad and bent up at the end, nearly as 

 long as the lateral process of the atlas. The upper lateral processes 

 of the third, fourth, and fifth vertebrae small, dilated at the end, and 

 more or less anchylosed ; the lower lateral process of each vertebra 

 similar, but much smaller and shorter. 



Halibaleena britannica. (Fig. 5, p. 141, cervical vertebrae.) 



Balcena (from Lyme Regis), Gray, Cat. Seals and Whales, 



p. 83, f. 3. (cervical vertebrae). 



Balcena biscayensis (part.), Van Beneden, Ost. Cet. t. vii. f. 7 (cer- 

 vical vertebrae, badly copied from the above-cited figure). 



