Hector.—New Zealand Cetaceans, 167 
conical"beak, channelled above and rounded below. The binder edge of the 
tooth is 18 inches from the condyle, the width of the base of the tooth is 
5 inches, and its anterior margin is 14 inches in advance of the commence- 
ment of the symphysis. The lower margin of the jaw is swollen opposite the 
insertion of the teeth, which are deeply inserted, and slope obliquely back- 
wards, with a decided incurvature towards the mesial line. The teeth are 
6 inches long, 3 inches wide, and ł inch thick. The acute point on the upper 
angle is very marked, and the anterior edge is worn into a deep notch, with a 
rough surface showing the laminated structure of the tooth. It is implanted 
in the jaw by seven or eight fang-like processes, as if formed by the fusion 
together of a number of teeth, 
There is no socket or notch in the jaw posterior to the tooth, the upper 
edge of the jaw being sharply defined, but from the tooth forwards there is a 
distinct dental groove showing the remains of alveolar processes. 
The species to which I refer the jaw is only known from a single specimen 
obtained at the Cape of Good Hope, which differs in the greater height and 
more marked incurvature of the teeth. As it is a larger individual, the lower 
jaw measuring 3 feet, this difference may be due to age or sex. 
MESOPLODON KNOXI.* 
Mesoplodon, Flower, le. Berardius arnuxii (Duv.), Hector, Trans. N.Z. 
Inst., II., 27. Smaller Ziphid Whale, Hector and Knox, Trans. N.Z. 
Inst., IIL, 125. Pl XIE, XIV. and XV. 
Ear bones; PL VL, 4a. and b. 
Teeth =; body fusiform; head rounded, beaked, upper snout long and 
flexible ; eye half way between the angles of the mouth and the pectorals, 
which aré small ; dorsal over the tail; tail-lobes large, faleate (Knox) ; skull 
globular, with a slender conical beak ; intermaxillaries form thin linear callous 
plates, incurved, and inclosing a deep groove occupied by a ligament that 
extends back from the snout to the blow-holes (as in Berardius), where the 
groove is closed by the slightly expanded front edge of the septum. [In the 
adult this groove is obliterated, and the upper surface of the beak sa 
hard callous ridge, as in Epiodon.] They then form a flat lunate area im 
front of the blow-holes, and behind rise vertically to form moderate knob-like 
* Dr. Gray informed me in January last that he intended to describe this species 
under a different name, but not having heard from him again on the subject I adopt the 
name I originally suggested in compliment to Dr. F. Knox, the votorsn anatomist, who 
has devoted much of his leisure to the study of Cetaceans during thirty years residence 
in this Colony. 
