390 



ADDITIONS AND CORBECTIONS. 



"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 vertebra? are small, slender, forming a strap-like sec- 

 tion, rather tapeiing towards and truncated at the tips on the side 

 of the apertui'es 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. 



Fig. 97. 



Side \'iew of the hinder side of the cervical vertebrEe of Mcganeuron 

 Krefftii? or Catodon ausfralis. 



" The hinder surface of the body of the last cervical vertebra is 

 oblong 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 depression." — Gray, P. Z. S. 1865, 440-442. 



Page 210, add to characters of Section II. : — 



T7ie pecfnra? fin elongate, suhfalcafe. T7ie cavity on the croiim of the head 

 sitmdcd hdckirard, fornii'd hi/ the niaJiHaries, and divided as it were into 

 two equ(d parts by a central bong ridge, which is more or less twisted 

 towards the right side of the head. Physeterina. 



The larger-headed genus Physeter has only been found in the 

 northern, and the shorter-headed genera Kogia and Euphysetes in 

 the southern hemisphere. 



