THE WHALEBONE WHALES OF THE WESTERN NORTH ATLANTIC. 



291 



at Monterey, Cal., and which belongs to one of the specimens described in 1868 

 (26, 226, 227) ; the British Museum contains a skeleton ; and there is a skull in 

 the museum of the California Academy of Sciences. 



The vertebral formula in the British Museum skeleton, according to Beddard, 

 is C. 7, D. 14, L. 14, Ca. 21 = 56. Ball's Monterey specimen No. 1 had the fol- 

 lowing: C. 7, D. 13, L. and Ca. 28 plus those concealed in the flukes. 



SKULL. 



The peculiarities of the skull can be best understood from the figures on pi. 47, 

 which represent the Monterey specimen in the National Museum. This same skull 

 was figured by Van Beneden in 1877 (6, 96), from photographs furnished him by 

 the Museum. Most striking are the rugosities of the occipital, the large size of 

 the nasals, the shortness of the nasal portion of the intermaxillae, and their great 

 depth anteriorly, the overlapping of the orbital process of the frontal by the proxi- 

 mal portion of the maxilla, and the strong tubercle on the posterior margin of the 

 former. All these characters are seen equally as well developed in the skulls 

 figured by Malm (67) as in the Monterey specimen. 



These and many other characters stamp it as a very distinct form, approaching 

 closely neither JBalcena nor JBalcenoptera. 



The following measurements are from the Monterey skull in the National Mu- 

 seum, and the data given by Malm (67, 17-37). I am not positive that I have 

 interpreted all of Malm's measurements correctly. 



RHACHIA.NECTES GLAUCUS COPE. SKULL. 



' Straight. Around the curves = 866 mm. 



The exposed portion. 



