220 MR. AT. K. PARKER OX THE STRUCTURE AND 



apart, but as tlie skull nan-ows in fjister than in the last, these passages are nearer 

 together than in it. The nasal roof {p.n.) is not large, and appears to be imperfect ; 

 the floor (s.n.l.) is very wide ; the pro-rhinals (p.rh.) are small and turned inwards ; 

 and the angles of the floor are but little dilated, as the maxillaries {ma;.) stop their 

 outward growth. The palatine bones are rather short ; they are falcate, and hide 

 the small ethrao-palatine cartilage, which cannot be traced into the half- used ptery- 

 goid cartilage, growing inside the pterygoid bone (fig. 7, pg.), wliich is part of the 

 suspensorium {-yy.). The bone (figs. 5-7, pj.) is very small and pointed in front, has 

 a large foot lying on and fixing the pedicle (pd.) ; and bending suddenly on the inner 

 process, the hind part half encloses the smallish, oval Eustachian opening (eti.), and 

 then runs down the inside of the quadrate {q.c). That part is somewhat ossified by 

 the quadrato-jugal {q.j-); is very high (fig, 7) and forms more than a right angle with 

 the basis cranii, but the condyle (q-c), which is a large sulcate trochlea, only goes as 

 far back as to the setting on of the stylo-hyal. A flange-like ont-growth of the 

 suspensorium is all that remains of the leafy " orbitar process " (or.j).), it binds on 

 the squamosal {-^q.). As in the last, the " annul us " {a.tij.) is large and perfect ; the 

 stylo-hyal {st.h.) is confluent, above. 



The stapes (figs. 9, 10, st.) is sub-oval, and has a boss ; the mediostapedial {m.st.) 

 has a large, cartilaginous lobe, but no free segment ; the extra-stapedial (e.st.) is 

 spatulate, and has a membranous supra-stapedial (s.st.). 



The hyo-brancbial structures (fig. 8) are similar to those of the last kind, but the 

 cerato-hyals {c.hi/.) are narrower; the lateral lobes are larger and freer; in the base of 

 tlie hinder pair there is a fenestra ; the thyro-hyals (t./uj.) are much smaller. The 

 mandible (fig. 7) is like the last, but the bony tracts are feebler in this young 

 individual; the hinge is deep and large. The labials {u.l^.u.l'-.) are similar to those 

 of B. ornatus, but the second is smaller. 



The investing bones are like those of a Chameleon ; they are crested and ornate 

 with " tears " of bone ; these are especially developed over the inter-auditory region ; 

 the roof bones (fig. b,f.p.) are very extended and polygonal, and leave a space in front 

 where they narrow out and join with the nasals, obliquely. Behind, they and the 

 squamosals (sq.) only leave the epiotic region naked, and their temporal is larger than 

 their orbital edge ; that free edge is elevated and grooved radially ; the temporal 

 suture is sinuous. The nasals (h.) are conchoidal, with a sharp retral facial stem ; 

 they are especially perlate on their thickest part in the prefrontal region. The feeble 

 premaxillaries {px.) stretch in an arcuate manner under the projecting rounded snout, 

 and the nasal processes (fig. 7, n.px.) have their axis almost coincident with the axis 

 of the long deep maxillaries (mx.). These latter bones are straight up to the hinge, 

 whilst they almost completely overlap the small quadrato-jugals {q-j.). There is a 

 rough notched septo-maxillary {s.mx.) under the outer nostril. 



The squamosals {sq.) have a huge supi-a-temporal plate, four-sided, irregularly, and 

 with the largest, or postero-internal, angle sharply notched. The side view (fig. 7) 



