
HALE—PIGMY SPERM WHALE IN SouTH AUSTRALIA 539 
is slightly wider at anterior end than it is posteriorly and is medianly incised at 
front and back. The third segment is irregular posteriorly, with concave sides and 
has a medianly incised front margin; it is a little less than half as long as the 
mannbrium, and is half as long again as its greatest width, which occurs near 
hinder end. The two component parts of each piece are completely ankylosed, 
but on the first and second segments there are interrupted median grooves. 
Tu this specimen, and also in the ealf, pelvie bones were specially searched 
for but none was located. 
Female calf, Port Vietoria. The skull (pl. xvi, fig. 1-5) is a little more than 
one-seyenth of {he total length of the animal (14°6'% compared with 14:2% for the 
mother). The rositmu from tp to anterior wall of left wostril is much shorter 
than in the two achits desevibed hereim, being less than two-fifths as long as total 
length of skull. The supracecipital in lateral view is slightly convex; actually 
aloug midline it is flat. The condyle projeets prominently and the foramen is 
relatively larger than in the adult skulls, The frontal extends to the vertex as a 
thin strip between the oeeipital and the maxilla, The lateral surfaces of the 
maxillae are not deep. The malar is broadly triangular, distinctly longer than 
deep. On both sides the maxillo-malar suture dips at middle of its length in the 
form of a wide V. he prefrontal (ethmoicd) is damaged bat appears to have 
formed a erest continuous with the rest of the sagittal crest, which strongly over- 
hangs the fossa of the left maxilla. The maxillae below the anterior parts of the 
tranaverse erest are only moderately thickened; the greatest width across the 
maxillae to the maxillo-malar sutures is one and one-fifth times the distance between 
the vertex am] the level of the antorbital processes. The antorbital fissures are 
almost closed except at the fundus; the fissure of the right side is much more 
oblique than the other, 
The palatal surface is markedly convex. On cach side a portion of the pre- 
maxilla is visible at the tip, between vomer and maxilla. On each maxilla au 
open alveolar groove runs back from tip for a short distance (45 mm.) and is 
continued a further 15 mm. or so as a canal completely bridged by bone except 
for a tiny foramen on the right side, There is no trace of sockets or of teeth. 
The width hetween the postorbital processes is equal to that between the 
zygomatic processes of the squamogsal. 
The tip of the left ramus of the mandible is missing; the right ramus has 
thirteen teeth subequal im size aiid differing from those of the adults now recorded 
in having the tips slightly hooked (text fig. 10). 
The tongue bones (test fig. 13) like most of the rest of the skeleton are soft, 
yery light and ‘‘ehalky,’’ and are easily abraded. The basihyal is very irregularly 
sexangular and is half as wide again as long, The thyrohyals are snbeireular ; 
