
HALE—PIGMY SPERM WHALE IN SOUTH AUSTRALIA 541 
of fifty-three vertebrae; the posterior caudals, however, are so small and fragile 
that it is possible that two or three have disappeared during maceration. In only 
one of the thirteen chevrons are the members of a pair not united. The meta- 
pophyses disappear after the third ecandal, while the neural canal becomes an 
open groove on the twelfth caudal and is evanescent on the fourteenth, The ribs 
are thirteen on each side, the anterior eight pairs have a double articulation, and 
the ribs further differ from those of the mother in being less asymmetrical 
posteriorly (see measurements), 
Length of ribs of Kogia breviceps, Port Victoria, South 
Australia; the measurements were taken in a straight 
line from head to free end, 
Adult 9 Juvenile 
Right. Left, Right. Left. 
mm, mm, mnt. mn, 
1 290 290 120 125 
2 410 410 200 200 
3 480 485 230 230 
4 500 510 240 240 
A 495 500 240 240 
6 480 485 235 230 
7 470 470 230 230 
8 445 445 220 220 
9 415 420 200 205 
10 380 380 190 190 
11 360 365 180 180 
12 108 340 165 170 
13 _ 80 145 140 
Relative to the total body length the sternum (text fig. 16) is considerably 
shorter than in the adult. The manubrium, though less expanded in anterior 
half, is proportionately shorter, and is nearly one-fourth as wide again as long; 
the two halves are incompletely fused in posterior two-thirds of length, and are 
separated by a fissure in anterior third. The second segment is one-third as long 
again as wide; its two parts are firmly fused, with a faint median groove. The 
third segment is composed of two separate pieces, oue ol which was damaged in 
stranding. 
Adult, Sleaford Bay. The skull is illustrated on pl. xvu, fig. 1-5. The 
rostrum as measured from the tip to anterior wall of left nostril is slightly less 
than one-half of the total length of the skull. In lateral view the supraoccipital 
is markedly concave and the condyle projects quite considerably. The frontal 
extends as a thin strip between the occipital complex and the maxilla. The lateral 
surface of the last-named is not very deep (particularly that of the right side) 
and that of the malar is broadly triangular in shape (one-third as long again as 
deep). The maxillo-malar suture on both sides is sinuate and sub-horizontal 
except for a wide downwardly directed V in anterior half. 
The sagittal crest between nostrils and vertex moderately overhangs the fossa 
