Hectok. — Xcw Zealand Cetacean?. . 1 65 



Inches. 

 Width of occiput ... ... ... ... ... 1 .5 



Length of beak from pre-orbital notcli ... ... ... 18 



Brain cavity — -length ... ... ... , . , ... 6 



Sperm cavity — length ... ... ... ... ... 1 2 



,, ,, width ... ... ... ... ... 5 



Width of beak at 1 2 inches from extremity ... ... 5 



Lower jaw — length ... ... ... ... ... 30 



,, „ height of ramus ... ... ... 7 



Weight of teeth 817 and 836 grs. 

 The beak is trigonal, obliquely truncate, and slightly upturned, three 

 times the length of the brain cavity ; vomer is small, fusiform, truncate 

 posteriorly (probably from its having been broken off in oj^ening the sperm 

 cavity) callous and depressed in a groove that is formed by the thin callous 

 margin of the intermaxillaries, which are continued backwards to form a 

 moderately high ridge, inclosing an oval basin, and rising to a deeply-notched 

 crest that overhangs the blowers at the level of the supra-occipital crest ; 

 the beak is slightly unsymmetrical at the point, being twisted to the right ; the 

 blowers are strongly twisted to the left ; the maxillaries are slightly elevated, 

 inclosing a lateral groove on each side of the beak, which groove expands 

 backwards to form shallow supra-orbital basins. 



On the lower aspect of the beak there are imperfect dental grooves, but 

 no tooth sockets, nor any acute tubercular granulations as described in 

 E. desmarestii. 



The lower jaw projects three inches beyond the beak, the thin callous 

 rami having straight, entire, upper margins as far as the commencement of 

 the symphysis, where they curve upwards and end in a conical, truncate 

 point, which is level with the upper surface of the beak when the 

 mouth is closed, and terminates in two short, stout, slightly compressed 

 teeth (PI. v., 2a. and b.), two inches long and four in circumference, im- 

 planted in shallow sockets. The teeth have slight irregular strise, and are 

 worn down into two lateral facets divided by an acute ridge. The position of 

 the teeth, when the jaws are closed, is two inches beyond the iipper mandible, 

 and unless they are applied against callosities on the upper lip it is difficult to 

 conceive how they are worn down to this acute form. Two teeth of similar 

 form, taken from the jaw of a whale cast up on the Manawatu beach, have 

 their facets forming an obtuse pyramidal tip (PL V. 3.) A shallow dental 

 groove extends back from the tooth sockets for fifteen inches with well marked 

 nutrient foramina that indicate twenty-two suppressed teeth. 



Only two species of Epiodon are known, and it is possible that the above 

 may be identical with Einodon australis from Buenos Ayres, the description of 



