150 
MR. W. K. PARKER ON THE STRUCTURE AND 
its short as 8, for the outline of the face stops a little short of the axial length; the 
mandibular hinges are slightly less retreated than in the large kind. The occipital 
condyles (Plate 27, figs. 5, 6, oc.c.) are similar ; the cartilaginous tracts at the mid¬ 
line are larger, and the projection of the ear-mass less, and less ossified; the “ tegmen” 
(fig. 5, t.ty.) is soft. The hind part of the orbital region is not so wide ; the girdle- 
bone is of less extent, and the superorbital tract of cartilage is not present. 
The nasal region is similarly broad, on the whole, but the outer nostrils (e.n.) are 
nearer together, and the inner nostrils (i.n.) are scarcely oval. What difference of 
length over breadth there is, is shown differently—the holes are transverse. There 
are no secondary fontanelles (fig. 5); the “annulus” (a.ty.) is smaller, but complete; 
the Eustachian openings (eu.) are similar in both kinds. 
The columella has no separate inter-stapedial (Plate 29, fig. 6, m.st .) ; and the 
supra-stapedial (s.st.) is confluent above ; the stapes (st.) has a boss. The investing 
bones differ in these two kinds, as those of the old and young of the same species 
differ ; there are no vomerine teeth. 
The mandibles and hyo-branchial apparatus (fig. 7) are very similar, but the former 
are more evenly arched, and the latter has a young appearance, for the front lateral 
lobes are not such elegant “ ears,” and they are not definitely marked off from the 
hinder projection (loJi.br.). The basal plate is longer, and the thyro-hyals (t.hy.) are 
slenderer, and are inbent. 
This small Ranine Tree-frog differs from the type in the following particulars 
1. In the genera] broad, short, outspread condition of the skull. 
2. There are no secondary fontanelles. 
3. There are no septo-maxillaries. 
4. There are no vomerine teeth. 
5. The tympanic annulus is less. 
G. There is no inter-stapedial segment, and the supra-stapedial is confluent above. 
7. There is no lobe to the hypo-hyal. 
Fourth genus. Hylarana. 
39. Hylarana maldbarica. —Young ; § inch long. India. 
The specimens dissected by me were only one-fourth the length of the full-grown 
adult, which attains to nearly 3 inches. 
Nevertheless I found the skull in these young individuals (Plate 28, figs. 1, 2) to be 
much more perfectly ossified than in the adult of II. temporalis (Plate 29, figs. 1, 2), 
next to be described. 
This is one of the longest skulls in the “ Order;” its length is to the breadth as 
7k to —a Frog’s skull which is as long as it is broad, is long as compared to most 
“ Anurous” skulls. 
The proportionate length of the three regions of the skull is very different from 
