461 
anterior edge of the nostrils and converging posteriorly, more or less 
interrupted in the middle. Width of the tympanum two-thirds of 
that of the eye. Skin smooth. Disks of the toes very broad, as 
large as the tympanum; the three outer fingers almost entirely 
webbed. Uniform grass-green above, yellow below. 
Hab. Coban in Guatemala. 
Habit that of H. arborea. Head broad, with flat crown, rather 
short muzzle, and rounded canthus rostralis. Eye of moderate size, 
rather prominent. Tympanum two-thirds the width of the eye, with 
a small fold behind it. The legs of moderate size, with very large 
discs, and with the tubercles on the lower part of the feet very well 
developed. Toes entirely, and the three outer fingers almost entirely, 
webbed. No fold across the chest. Skin without any appendages. 
Tongue with a conspicuous notch posteriorly. Male with a single 
subgular sac. Sacral vertebra considerably dilated. Upper parts 
uniform grass-green, except the upper arms and thighs, which are 
colourless. Lower parts yellow. Length of the body of an adult 
female 3 inches ; length of the fore leg 2 inches ; length of the hind 
lex 44 inches. 
Of this Tree Frog I obtained three examples at Coban, all of which 
were caught by the Indians. It was the only species I met with. 
8. Nore on THE BaLanicers REX. By A. D. Barrurrtr. 
The question of the affinities of the Baleniceps having been dis- 
cussed by so many able ornithologists, it may be interesting to know 
that this bird does not possess the remarkable patches of down found 
on each side of the breast in all the Herons and Bitterns. 
Having had the opportunity of ascertaining this fact by an exami- 
nation of the living bird, now in the Society’s Gardens, I am en- 
abled to say that these patches (which are of a singular dense and 
close structure, and are found beneath the feathers on each side of 
the front and fore part of the pectoral muscles) do not exist in the 
Baleniceps. The absence of this structure may, I think, assist in 
indicating the true affinities of this bird, as pointed out by Dr. Rein- 
hardt in his communication to the Society on this subject *. 
9. CuaractTerRs or Ten New Species or AMERICAN Birps. By 
Paruie Lutriey Scuater, SECRETARY TO THE SOCIETY. 
1, CaMPYLORHYNCHUS NIGRICEPS. 
Supra fulvo-rufescens nigro transfasciatus: pileo toto nigro: 
superciliis elongatis rufescenti-albidis, striga post-oculari nigra 
subtus limbatis: alis nigris, harum tectricibus fulvo extus lim- 
* See antea, p. 377. 
