190 
MR. W. K. PARKER OK THE STRUCTURE AND 
outer passes outside the front of the nostril and is a hollow shell; these are permanent 
upper labials (u.l 1 . 
The lower labials (fig. 12, 1.1.) are, as in the earlier stage, very solid; but now they 
form a very good half ring, segmented across the middle ; these scooped, thick ridged 
cartilages are articulated with the mandibles (• mk .), massive, swelling segments, with 
a concave condyloid face, and a squarish, hooked, angular process. The massive 
suspensorials (sp.) are nearly half as broad as long; their pedicle (fig. 11) is narrow at 
its root but soon widens ; their otic process (fig. 10, ot.p.) is a high, thick, inturned rib 
of cartilage. 
The large leafy orbitar process ( or.p .) is half the size of the suspensorium, it is of 
good width, and very long, from its broad, sessile root, to its rounded apex. The 
condyle for the hyoid (hy.f. ) is the normal rimmed hollow, and the condyle of the 
quadrate is rather small, and selliform. The pterygo-palatine bridge ( p.pg .) is rather 
small, and the cartilage in front of it very broad, sending inwards a sharp, but small 
pre-palatine hook ( pr.pa .) ; I find no rudiment of a post-palatine over the bridge. 
The hyoid (fig. 13) is massive, its distal lobes are lessening; its condyle large, and its 
stylo-hyal end sharp and uncinate. The sharp, shell-like fronto-parietals (fig. 10, 
fp.) are as much developed now, as in the average of the Hylidce, in the adult; the 
parasphenoid (fig. 11, pa.s.) has the shape and proportions, now, that it has in the 
adults of many dwarf Toads [Pseudophyrne, &c.), being broad, splintery, and with 
sharp, angular lateral processes. 
The basi- and liypo-branchials are normal, and the cerato-branchials ( proper) are 
evident, as distinct from the extra-branchial pouches, which are, also, quite normal; 
these parts were dissected and examined, but not figured. 
This specimen has added considerably to the sum of our knowledge of the growth 
and metamorphosis of the Batrachian skull; I shall refer to it, especially, in my 
“ Summary.” 
Third sub-division.- — Tree-frogs, with dilated sacral apophyses and parotoids. 
Family. “ Pelodryadida:.” 
First genus. Pelodryas. 
53. Pelodryas cerulceus. —Adult male; 3 inches long. New South Wales. 
This skull is of the average breadth, which is to the length as 9 is to 8 ; the 
quadrate condyles almost reach as far back as the occipital, and the general outline is 
a very accurate semi-ellipse. 
At first sight this skull is seen to belong to a very different type to that of the 
Common Frog; it is intermediate in size between those of the Common and Edible 
kinds, and in detail differs much from them; the large Oriental “ Polypedatkke ” help 
to fill in the space between the typical Frogs with pointed toes, and the typical flat- 
toed kinds. 
