172 
MR. W. K. PARKER OK THE STRUCTURE AND 
third of the mid skull, runs a little into the wings below, and above creeps along the 
septum nasi almost to the end of the snout ( ai.n.). The whole of the large ear-shaped 
superorbital tract ( s.ob.) is unossified ; it is thrice as large as in the last. The optic 
fenestra (II.) is twice as large as in the last. In that species the flat mid skull was 
widest behind; in this, the skull widens and bulges from behind forwards. With the 
exception of the top of the septum, all the nasal region is unossified ; and in this kind 
the roof and floor are equal, and there is no rostrum. The pro-rhinals ( p.rh.) are 
very wide, and have the shape of the angular lobes (right and left of s.n.). 
Here the snout is almost as broad and transverse as in the Indian Polypedatidse ; 
the labials ( u.V-.u.l 3 .) are normal. The palato-suspensorials are curiously different in 
these two kinds : here the ethmo-palatine (e.pa.) is broader; the pre-palatine a sharper 
adze blade, and the post-palatine cartilage retains a greater breadth; it ends in this, 
as in the other, in solid condyles—both of pedicle and quadrate, as in Pelodryas. 
But in this the palatine (pa.) is a mere needle of bone, whilst the pterygoid (pg.) 
is broader; it is of necessity longer, on account of the greater retreat of the quad¬ 
rate : tins latter part is not ossified. 
In this species the Eustachian openings ( eu .) are large and nearly circular, as in the 
last; but the inner nostrils ( i.n.) are still larger; they are oval, and look obliquely 
inwards and forwards. 
The annulus ( a.ty.) is large, but unclosed; the stapes (figs. 7 and 9, st.) large and 
sub - oval; it is but little produced outwards. The bony medio-stapedial (m.st.) has a 
very thick, solid, proximal part, from the core of which an ear-shaped inter-stapedial 
lobe (m.st'.) passes inside the stapes. The shaft is long, and in front the unossified 
extra-stapedial (e.st.) grows as a narrow tongue, bent on the core of the shaft, and 
having a lobate edge, but no distinct supra-stapedial. 
The stylo-hyal (fig. 9, st.hr) is confluent above ; it widens downwards into the cerato- 
hyal (fig. 8, c.hy.), which soon lessens again, and becomes a long, delicate, retral, non- 
lobate hypo-hyal (h.hy.). There is no front lateral lobe to the very short basal 
cartilage, which tends to develop a hinder segment ( b.b/ .); this exists as a very rare 
median lobe between the long, slender sub-arcuate thyro-liyals ( t.hy.). 
The mandible is normal, is very long and slender, and has a distinctly lobate 
coronoid process to the articulare (fig. 8, ar.). 
The mento-Meckelians (m.mk.) are large; the feeble dentaries (cl.) reach half-way 
along the ramus. 
The investing bones are, on the whole, about as thin and delicate as in the last; but 
the roof-bones are wider by one-third. The fronto-parietals (fig. 6,f.p.) partly overlap 
the ear-capsule, and nearly reach the ethmoidal wings. They are sigmoid in outline, 
and bend inwards, first behind the fontanelles, and again at its fore end; then they 
lessen this space slightly, and end in a rounded lobe. The nasals (n.) are large, thin, 
crescentic shells. The premaxillaries, maxillaries, and quadrato-j ugals ( px ., mx. , q.j.), 
* The top of the stylo-hyal is hidden in fig. 7. 
