738 THE SPERM WHALES, GIANT AND PYGMY. 
(Owen, l. c., p. 41). A pair of teeth are also developed 
near the front of the upper jaw. With these mandibular 
and dental characters seem also to be coórdinated a less de- 
veloped dorsal fin, comparatively longer temporal fosse, 
the deep fissure limiting the front part of the supraorbital 
ridge ; the more deflected jugals, and the more rounded lat- 
eral ridges of the hinder portions of the maxillaries. As it 
is certain that a generic name will sooner or later be de- 
sired for the form so distinguished, it may be called on 
account of the symmetrically rounded lower jaw Callig- 
nathus. The known species are as follows: 
1. KOGIA BnEVICEPS Gray ex Blainv. Habitat, Cape of Good Hope. 
2. Koara GnaYr Gray ex Wall. Habitat, Australia, near Sydney. 
3. KoarA MacLkavi Gray ex Krefft. Habitat, Australia, near Sydney. 
. Koca FLowrnI Gill The form is robust; the dorsal very low, 
** posterior to which is a sharp ridge as if belonging to the fin, extending 
towards the tail;" the color black or blackish above, whitish or yellow- 
ish-white below, and upwards and forwards, including the end of the 
nout. 
The lower jaw at its symphysis below is very compressed, has concave 
zontal. 
The teeth are very long and slender, very much curved outwards and 
backwards, and acutely pointed; there are about fourteen or fifteen in 
number on each side. 
The animal on whose jaw and portrait the species has been based, was 
obtained a short distance from Mazatlan, in 1868, and measured nine feet 
in length; its blubber yielded seventy-five pounds of oil. No details as 
to its mode of capture were sent by Colonel Grayson, but it was re 
marked that “ it is said to be a strange fish in those waters." 
B. CALLIGNATHUS sIMUS. Habitat, India, coast of Vigigapataw, Madras 
Presidency. ; 
9. On the Nomenclature of Kogia. A few words con- 
cerning the nomenclature of the genus seem to be demanded. 
Dr. J. E. Gray, perceiving certain discrepancies between 
the figure and descriptive notice by Blainville of a skull 
from the Cape of Good Hope, referred by the latter author 
to the genus Physeter, and named JP. breviceps, conferred 
