
542 RECORDS OF THE S,A, MUSEUM 
of tho left maxilla in its rostral half; the right premaxilla reaches the siunmit of 
the erest at some little distance before the vertex, at which it is elevated, although 
only very slightly, above the left maxilla, The prefvontal is trumeate anteriorly 
but does not extend as far forward in the canalicwlate vomer as it does iv the 
Port Vietoria female; between the nares it forms a thin erest which is continuoens 
with the rest of the mid-cranial crest but the latter rises abruptly at a vight angle 
just posterior to the level of the nostrils. The area wilhin the transyerse maxillary 
crest is approximately as wide as long; the greatest width across the maxillac 
to the maxillo-malar sutures is very little greater than ihe distance between vertex 
and level of antorbital processes, The autorbital notches are narrow and oblique. 
The palatal surface is rather stvongly convex and on cach side a small portion 
of jhe premaxilla (length about 25 mm.) is wedged between maxilla anil yomer. 
On the right side a deep and continuous alveolar groove extends back from the 
front of maxilla tor a distance of 108 mm. On the lett side the maxillary groove 
is longer (126 mm.) and reaches almost to level of antorbital tubercles; it is 
interrupted, in advance of middle of length by a short hony bridge, Apart from 
this last there are no indications ol alveolar sockets and so Leeth were present. 
The width between the postorbital processes is barely greater than that 
between the zygomatic processes of the sqttumosal, As shown by the measurements 
and photograph (pl. xvii, fig, 5) the oecipital foramen is rather narrow. 
In the mandible (pl. xvii, fig. 6-7) the dental sulcus is lateral at the tip but 
slowly rises 10 the rear, its extreme posterior Limit being dorsal in position. ‘The 
groove in the left rami is divided into fourteen sockets, each containing a tooth; 
in the right ramus there are thirteen pits. The anterior eight or nine of the 
sockets ave separated by complete though exceedingly fragile bridves of boue, hut 
the divisions between the posterior ones are much lower, ‘The terminal portion of 
the suleus takes the form of a short #roove, intieh narrower aid shallower than 
the preceding sockets, The teeth ave amooth, subequal in length and are evenly 
curved (lext fig, 11). 
In the tongue bones the basihyal (text fig, 14) 1s as lone as wide and, as in the 
Port Victoria adult, is markedly hexagonal, It differs, however, in haying the 
posterior edge thin and concave from side to side while at the much narrower 
front the two articular facets are nol confluent, the anterolateral margins ave 
concave and the postero-lateral attachment areas are very rugose, The thyrohyals 
are suboval. 
Asin the adult female noted above the cervieals (pi. xviii, fig. 9-11) are fused 
into one solid mass; there is litle mdication of the component bones dorso-laterally 
or dorsally. Tt differs in that the dorsal outline, as seen from tlie side, is coneave 
intead of slightly convex anterior to the vertex, the dorsum is rather sharply 
ridged medianly and there is a lamellate expansion at the rear of the summit, 
