210) ARCHIVOS DO MUSEU NACIONAL — VOL. XXIV 
Inferiorly the form is simplefied. The presence of the labial papillae is 
noted; the line of mucose pores is more clearly verified as incomplete as, 
being triple, it is interrupted in the 3º series which does not cross the 
median line and does notappear on the left side; here the branchial pore 
is subtubulated and retroverted. The first series of pores starts from the 
angles of the mouth and curves, like a collar, over the dewlap. The second 
crosses the thorax from side to side. An anal papilla is noticeable. Through 
transparency the limits of the brachial chamber, as well as the difference 
in colouration of the reddish subcephalic region from the rest of the ventral 
part which is silver white. Here is seen the external abdominal artery 
and the extreme of the branchial tube which is blood red. The profile 
(fig. 3) permits of the especial facies of the tadpole to be more clearly seen, 
defining same as carnivorous. The cut ànd form of its mouth predicts 
this. The labial papillae (fig. 4) are in number from 7 to 11 on each side of 
the lips and remain as anteverted fringes and straightly directed forward, 
They are followed by 8 series of fine tectlr, isolated. and “vertical, gro- 
wing directly on the internal side of the lips. Then come the psittaco-. 
rhyncoid'teeth, carnivorous par excellence, whose edge is finely crenulated. 
like-the blade of a saw. - RE sos 
nto AS 
An excursion to the locality where the first tadpole was taken, resulted. 
in the capture of many rore, in all 18, in unequal stages of evolution. 1 
presume that they are effectively Ceratophrys, as those that have the feet 
fully developed, present the dorsal patches to be observed in fig. 5 and leave 
no doubt as to identity. The labial patch remains, as also the labial fringes, 
but the form has changed, the head being better defined, having a kind of 
canthus rastratis which is scarcely defined anteriorly. o | 
| From the eyes to the base of the tail start the two folds which 'go to. 
constitute the arrowechead characteristic of the back of Ceratophrys. The 
interocular stripe shows, though as yet the ceratoid appendix of the | 
eyelids cannot "be discerned. From the line of the: rostral canthus which, 
passing by the eyes is directed backwards:and outwards and corresponds, 
to the super lateral glandular line of Rana, the colouring is frankly ferru- 
aims bronzed, On the outside of the arrowhead line are situated the two 
markings in comma which later go to form the dorso thoracic and dorso 
lumbar glands of the “intanhas”. The legs weak as in Bufo have three, 
joints and transversal bands on the upperside. The only difference on the 
underside is the vestigial appearance of the apertures through which will 
Ea (orelogs, hidden in the brachial chambers. This paludicoloidal stage, 
8- - occurs 23 days after the appearance of the hindlegs, figured in 1-3. 
