188 CYSTIGNATHID 2. 
teeth. Ear perfectly developed; tympanum distinct. Fingers 
and toes webbed, the tips dilated into large disks. Outer metatarsals 
separated? No omosternum; sternum a narrow cartilaginous 
plate. Terminal phalanges bifurcate. 
Keuador. 
1. Centrolene geckoideum. 
Renner geckoideum, Espada, 1, c. p. 88, and Viaj. Pacif., Vertebr. 
pl. 2. f. 5. 
Vomerine teeth in two oblique groups between the choane. 
Fingers half webbed, the membrane extending as a fringe to the 
disks ; toes entirely webbed. Humerus with a strong spine. Skin 
of upper surfaces granular and tubercular. Greyish above ; hands 
and feet darker. 
Rio Napo, Ecuador. 
3. MIXOPHYES. 
Mixophyes, Giinth. Proc. Zool. Soc. 1864, p. 46; Cope, Nat. Hist. 
Rev, 1865, p. 111, and Journ. Ac. Philad. (2) vi. 1866, p. 93. 
Pupil vertical. Tongue circular, entire, free behind. Vomerine 
teeth. Tympanum distinct. Fingers free; toes webbed, the tips 
not dilated. Outer metatarsals separated by web. Omosternum 
cartilaginous ; sternum a cartilaginous plate. Terminal phalanges 
simple. 
Australia. 
1. Mixophyes fasciolatus. 
Mixophyes fasciolatus, Giinth. Proc. Zool. Soc. 1864, p. 46, pl. 7. 
f. 1, and Ann. § Mag. N. H. (8) xiv. p. 3811; Steindachn. Novara, 
Amph. p.10; Keferst. Arch. f. Naturg. 1868, p. 255, pl. 5. f. 6. 
Vomerine teeth in two straight series between the choanze. Head 
large; snout rounded; interorbital space as broad as the upper 
eyelid ; tympanum three fourths the width of theeye. Fingers and 
toes slightly swollen at the tips; first finger slightly longer than 
second ; toes two-thirds webbed ; subarticular tubercles well deve- 
loped ; inner metatarsal tubercle elongate, oval, compressed; no 
outer tubercle. The hind limb being carried forwards along the body, 
the tibio-tarsal articulation reaches the tip of the snout. Skm 
smooth ; a slight fold above the tympanum. Brownish olive above, 
indistinctly marbled with darker; a dark cross band between the 
eyes; a black band from the tip of the snout through the eye to 
behind the tympanum ; limbs with narrow black cross bars. Male 
with a subgular vocal sac. - 
KE. Australia, 
i;0.°38 2: Clarence River. G. Krefft, Esq. [P.]. (Types.) 
