DEVELOPMENT OF THE SKULL IN THE LACERTILIA. 
009 
“ upper labial” (u. /.), a part separate in the Snake, or now and then confluent, in front, 
with the cornu trabeculae. 
As in the Snake, this labial turns by the side of the duct, into the liilus of the 
gland ( n.g.) ; here the septo-maxillaries ( s.mx.) are at their widest part, and the vomers 
(v.) below are widening. 
Over the vomers we see the shelving nasal floor (n.f.), supported by the vomers ; 
the nasal bones (n.) and the maxillaries (mi.) are larger than in the last section. 
In the 5th section (fig. 5), the nasal walls are much more bent, inwards, and they 
turn outwards again to reach the facial wall; they thicken, turn inwards suddenly 
again, and then we see how much they owe to the large upper labial (u.l.). I cannot 
tell whether there was another labial here, as in the Snake, or only one, as in the Bird. 
Each vomer (v .) here is in two parts, the section having been made through its 
notch for the duct of the gland and the ingrowing labial cartilage; the septo- 
maxillaries (s.mx.) are tapering ; the nasals and maxillaries (n., mx.) are widening ; the 
nasal gland (n.g.) is at its hinder face. 
The 6th section (fig. 6) is through the curious fenestras in the upper surface of the 
nasal capsules (Plate 43, fig. 7) ; the cartilage of the roof is wide apart from the 
cartilage of the wall ; the labial cartilage has been passed, but the narrow floor (n.f.) is 
there. 
The razor has passed through the vddest part of the vomers (v.), behind the septo- 
maxillaries and nasal gland, and in front of the prefrontal (see fig. 8, pf). 
Here the trabecular base of the septum (s.n.) is rounded again, and the septum 
itself is more evenly thick, as compared with the last section. 
The inturned nasal wall, separate from the roof, has closed in upon the glandular 
follicles, and the stem of this tube—the “ inferior turbinal” (i.tb.) —is short, with a 
pedate root or base. 
The 1th section (fig. 7) shows the same thing, but the turbinal tube is more 
constricted, and begins to show some of the solid cartilaginous mass into which it 
passes on the front of the antorbital (post-nasal) wall; this is the last section in front 
of the “ olfactory fossa ” (Plate 43, fig. 7, I). 
The 8 th section (fig. 8) was made behind that fossa, but the thick fore part of 
the antorbital plate was shaved through ; the marks of the hind part of the glandular 
mass are seen upon the ear-shaped plate, which is the end of the inferior turbinal 
(i.tb.). 
Above, this section is close behind the nasal roof and olfactory recess (Plate 43, 
fig. 7,1). Seven cartilages are cut through, and the outer bones are not the same as in 
the last, for we are now behind the naso-frontal suture, and the frontal (f.) and pre- 
frontals (pf) come into this section. 
If this figure be compared with the upper and side views of the endocranium 
(Plate 43, figs. 7, 8), we shall see how imperfect the cranial cavity is in front. 
The median wall is thick throughout, and stands alone, flanked below by the 
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