Dr. J. E. Gray on a new Sperm Whale. 289 



The lateral processes of the second, third, and fourth vertebrae are 

 produced and united into a broad, thick, angular process, which is 

 expanded at the side, giving the united mass a rhombic appearance, 

 the width of the side being about one-fourth more than the height 

 of the mass. 



Fi 



g- 



Side view of the hinder side of the cervical vertebrae of Catodon Krefftii. 



There is a tubercle, which is most probably the end of the lower 

 lateral process of one of the anterior cervical vertebrae, at the lower 

 part of the hinder side of the front lateral expansion. 



The three hinder vertebrae have no distinct lower lateral processes ; 

 their place is only marked by three slight ridges on the lower edge 

 of the hinder side of the mass. The upper lateral processes of the 

 hinder cervical vertebrae are small, slender, forming a strap-like sec- 

 tion, rather tapering towards and truncated at the tips on the side of 

 the apertures for the passage of the nerves for the neural canal. 

 The neural canal is rather large, oblong transverse, the height being 

 about two-thirds of the width ; it is rather larger and higher behind. 



The hinder surface of the body of the last cervical vertebra is ob- 

 long transverse, about two-thirds of the height of its width at the 

 widest part ; the lower edge is rounded and rather angularly pro- 

 duced in the centre, and the upper margin transverse, with a slight 

 central depression ; the surface is concave, with a central, linear, 

 perpendicular, compressed line. 



The cervical vertebrae in Catodontid<e are united into a single mass 

 by their bodies, the neural arch, and the lateral processes. The 

 lateral processes of the anterior vertebrae are produced, and form a 

 thick, subcorneal, triangular prominence on the side of the mass. 

 The front side is nearly flat, and the lateral processes of the hinder 

 vertebrae are shorter and shorter to the last. The hinder surface 



Ann. cy Mag. Nat. Hist. Ser. 3. Volxvi. 20 



