51 



To judge from the articulating surfaces, there are about 

 thirteen V bones iu this animal. Of these, however, only seven 

 have been found, the first of which belongs to the twenty-fifth 

 vertebra. The following table will express their dimensions, and 

 also the particular vertebrae to which they were attached by 

 cartilaginous ligaments : — 



OF THE EIBS. 



The ribs are not very round as iu Catodon, but flattish and 

 often somewhat angular. The animal is thus more compressed, 

 that is, narrower and deeper in pro2:)ortion than Catodon. In- 

 stead of ten pair of ribs, as in the true sperm whale, the 

 EupJiysetes has no less than fourteen pairs, of which the last pair 

 are merely minute rudimentary bones floating in the side of the 

 animal and entirely disjoined from the vertebral axis. The first 

 rib, which is broad and flat, is bent in the middle almost at right 

 angles, and has but one articulating surface; that is, to the 

 transverse process of the first dorsal vertebra. The seven 

 following pairs have each two articulating surfaces for each con- 

 secutive two of the first seven vertebrae, and the next five pairs 



