1865.] FROM THE CAPE OF GOOD HOPE. 525 
and other bones, with a large oblong concavity under the prominent 
enlarged nasal bones in front of the deeply seated blowers; the 
inner surface of the concavity lined on the side by the expanded 
hinder end of the intermaxillaries, and edged on the sides by the 
raised edges of these bones and the inner margins of the hinder parts 
of the maxillee, the confines of the concavity being separated from 
the side-margin of the brain-case by a deep impression. The beak 
elongate, slender, compressed on the sides, fringed on the upper part 
of the sides by the edges of the enlarged callous intermaxillaries, 
which contain between them a much-enlarged callous vomer, which 
tapers in front into the end of the beak, and is truncated behind, 
filling up the narrowed fore part of the frontal concavity. 
The upper jaw toothless. The lower jaw slender, produced in 
front, toothless ; it may have had two teeth in front in the young 
state, as there are obscure indications and two pits. 
The skull is much more like the usual form of that of the Del- 
phinoid Whales than that of Catodon or Kogia, and somewhat like 
that of an Hyperoodon without the elevated ridges of the maxille on 
the sides of the beak. 
The peculiarity of the genus is the great development of the inter- 
maxillaries and the large size and callous state of the upper surface 
of the vomer. 
The intermaxillary bones which fringe the upper part of the sides 
of the beak are thick, hard, and shining, forming with the enlarged 
vomer the upper part of the beak ; they are expanded behind so as 
to form the large hemispherical cavity in the crown, with nostril and 
blower at the base of its hinder part. This cavity is lined on the 
inner side with the expansion of the intermaxillaries, which are 
supported on each outer side by a wall formed by the elevation of 
the inner edge of the hinder part of the maxilla. The wall of the 
cavity is separated from the outer margin of the maxilla, which 
forms the inner part of the outer edge of the brain-case, by a deep 
concavity. 
The upper part of the spermaceti-concavity is arched over by the 
thickened prominent nasal bones, and by the dilatation of the thick 
hinder edge of the walls. 
In Catodon and the allied genus Kogia the spermaceti-cavity oc- 
cupies the whole upper surface of the skull, and is surrounded by an 
erect wall formed by the elevated hinder and lateral edges of the 
maxillee. It is continued in front to the end of the broad expanded 
beak of the skull. The blowers are in the base of the hinder part 
of the concavity. 
The intermaxillary bones are narrow, elongate, with the linear 
vomer forming a sunken groove between them on the upper surface 
of the beak. In Catodon the hinder part of the intermaxillary is 
only slightly dilated, and forms but a small part of the base of the 
crown concavity, as shown in Cuvier’s figure (Oss. Foss. v. t. 22. 
f. 1-3); and from Mr. Macleay’s description they seem to form a 
smaller part of the surface of the concavity in Kogia (see p. 39). 
