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MR. W, K. PARKER OK THE SKELETON 
narrow, turned upwards, and confluent with the auditory capsules (cm.). Under the 
square naso-palatine canal ( p.n.c .) the tip of the bowl of the intertrabecula ( p.i.tr .) is 
cut across, and near the capsule the mandibulo-hyoid bar ( m.hy .). At a considerable 
distance down the side of the throat the hooked cartilage or 1st pliaryngo-branchial 
(p.br 1 .) is cut across, and below it the quadrate region (q.). The basi-hyal ( b.hy h .) is 
still double, and deep. 
Section 25 (Plate 14, fig. 2).—We have now reached the notochord ( nc .), a mere 
point here, and not invested by the investing mass, which is still a mere selvedge 
to the inner and lower edge of the auditory capsule (au.). This section is behind the 
intertrabecula, and it shows the naso-palatine canal (p.n.c.) still closed below. The 
lateral cartilages cut across are the mandibulo-hyoid band (m.hy.), the first pharyngo- 
branchial (p.br 1 .), and the quadrate (q.) ; below, the basi-hyal is still double, and 
composed of hard cartilage. The bracket-shaped fold of membrane (above vl., the 
pharynx is below plix., the dotted lines are wrong) across the roof of the pharynx is 
the beginning of the “upper velum.” 
Section 26 (Plate 14, fig. 3).—This section shows the notochord (nc.) and the in¬ 
vesting mass increasing, and the cavity of the auditory capsule (au.) laid open, and 
in this part the “anterior canal” is enclosed specially by cartilage. The neck and 
shoulder of the hyomandibular (Jim) is first soft, and then hard cartilage. The 
investing mass has grown beneath the capsule, as well as along its inner edge, below, 
and thus the hyomandibular which grows from it seems to be a mere outgrowth of the 
capsule. 
Section 27 (Plate 14, fig. 4).—The notochord (nc.) is now invested by the para- 
chordals; the hyomandibular (Jim.) is thinner in the middle, here, than at its fore edge, 
as seen in the last section. 
Section 28 (Plate 14, fig. 5).—This is a very instructive section, for here the naso¬ 
palatine canal (p.n.c.) is opening below, revealing the diagnostic character of the Myxi- 
noids—(“ Hyperotreta”). The investing mass (iv.) now forms a neat trough for the 
notochord, and is, in reality, continued as a thin but confluent lamina under the 
auditory capsule (au.) where the cartilage is continuous with the soft head of the 
hyomandibular (Jim.) By comparing this section with the side view (Plate 9, fig. 2, 
lim) it will be seen that in this region the bar is soft in three places and hard in two. 
Inside the lower or symplectic region of the bar (sy), where it runs into the quadrate 
region, the neck of the large 1st pharyngo-branchial (p.br 1 .) is seen as hard car¬ 
tilage. The basi-hyal (b.hy 6 .) still retains the same character as in the sections 
immediately in front of it. 
Section 29 (Plate 14, fig. 6).—In this section the notochord (nc., iv.) is , for once, 
enclosed in cartilage. In the younger dissected specimen (Plate 10, figs. 1, 2,) the 
investing mass was not perfect anywhere above the notochord—only below (fig. 3). 
The auditory capsules (au.) are perfectly confluent with the basal plate, and here we 
are behind the head of hyomandibular, so that there is a space before cartilage is 
