
536 RECORDS OF THE S.A. MUSEUM 
External measurements of Kegia breviceps, Port Victoria, South Australia, 
Adult Juvenile 2 Foetus. 
mm, pereent. mm, percent, mm. percent, 
Total length to notch of tail flukes 2,897 100 1,71 100 193 100 
Greatest depth of body 660 22-8 470 27°5 47 24-4 
Tip of snout to vertical level of 
anterior corner of eye 337 11-6 229 13-4 24 12-4 
Tip of mandible to vertical level of 
anterior corner of eye 229 7-9 140 8-2 10 5-2 
Tip of snout to vertical level of 
anterior edge of dorsal fin 1,499 51-7 915 53:5 103 43.4 
Tip of mandible to axilla 610 S11 380 22-2 40) 20°7 
Tip of mandible to anterior point of 
genital slit 1,019 66-2 —_ _ 78 4004 
Width of flukes 700 24-2 410 24-() 34 17-6 
Height of dorsal fin 91 3-1 63 3°7 4-5 2-3 
Length of base of dorsal fin 422 11-1 185 108 12+5 6-5 
Length of pectoral fin along 
uuterior edge 397 13:7 216 12-6 28 14.5 
Greatest width of pectoral limb 144 a0) 84 4-9 115 6-0 
Length of gape 150 5°2 77 4:5 8°5 4-4 
Length of eye a1 1-1 22 1:3 4+0 2-1 
Depth of eye 17 0-6 14 Og — _ 
THE SKELETON. 
Adult female, Port Victoria, 'The skull (pl. xv, fig. 1-5) is almost one-seventh 
of the total length of the whole animal (see Schulte, 1917, p. 366). Fusion of the 
sutures is much more advanced than in the Sleaford Bay example described below. 
The rostrum from tip to anterior wall of left nostril is decidedly more than 
half of the total length of skull. The supraoccipital, as seen from the side, is 
concave and the condyle is prominent. The frontal is not distinetly marked off 
from the occipital complex. The lateral surface of the left maxilla is deep, two- 
thirds as deep again as the right, The maxillo-malar suture on the left side has a 
V-shaped downward projection at about first fourth of length of malar, where 
the suture sweeps abruptly upward; at the rear the suture curves downwards and 
thus the malar, measured along this suture, is longer than deep. The maxillo-malar 
suture of the right side is in the form of one very wide VY. the caudal two-thirds 
being almost horizontal. 
The mid-facial erest overhangs the fossa of the left maxilla strongly in its 
rostral half. The right premaxilla reaches the summit of the crest at the vertex 
where both it and the left maxilla ave swollen and equally elevated, with the suture 
between almost obliterated. The prefrontal is truneate in front and forms a high 
thin erest between the nares; this ethmoidal part of the crest fades out just before 
the anterior end of the sagittal crest formed by left maxilla and right premaxilla. 
The maxillae below the anterior parts of the transverse erest are thicker than 
in the younger Sleaford Bay example; the greatest width across the maxillae to 
