Reptiles and Batrachians from Madagascar. O47 
PLATYHYLA, g. n. (Dyscophidarum). 
Pupil horizontal. Tongue large, oval, entire, and free 
behind. Palatine teeth* in two long, oblique, transverse 
series, converging posteriorly, separated by a narrow inter- 
space. Tympanum hidden. Fingers and toes webbed at the 
base, the tips dilated into very large disks supported by a Y- 
shaped terminal phalanx. Outer metatarsals united. —Cora- 
coids strong ; preecoracoids very slender, bent nearly at right 
angles, only the proximal half ossified ; omosternum very 
small, cartilaginous ; sternum a small cartilaginous plate. 
Diapophyses of sacral vertebra moderately dilated. 
The following analysis shows the relations of this new 
genus to the other members of the family Dyscophide :— 
I. Pupil vertical; palatine teeth in long 
transverse series. 
A. Preecoracoids ossified ; tips of fingers and 
toes not dilated. 
SLOmMMMVeRy ATP Ole... crortelorsioneieteseieies choi ... 1. Dyscophus, Grand. 
SS PSUMUM SEA alee et ni eem cpa teletelansinyeleeveces 2. Calluella, Stol. 
B. Preecoracoids not ossified ; tips of fingers 
and toes dilated fii tairscm alae hia] +letels 3. Plethodontohyla, Blgr. 
II. Pupil horizontal. 
A. Palatine teeth in long transverse series. 
1. Preecoracoids ossified ; tips of fingers 
and toes dilated. 
Fingers and toes free; praecoracoids entirely 
GESITIOU Pirin oh sie ci Stas a lets ores sie age 54 @ 4. Mantipus, Ptrs. 
Fingers and toes webbed at the base; pra- 
coracoids semiossified ..............+- 5, Platyhyla, Bier. 
2. Precoracoids not ossified; tips of fin- 
gers and toes not dilated .......... 6. Phrynocara, Ptrs. 
B. Palatine teeth in one or two small groups ; 
precoracoids ossified; tips of fingers 
and toes dilated. 
Two small groups of teeth on the palate .... 7. Platypelis, Blgy. 
A single small group of teeth in the middle of 
PHO GIA ALON HAI Meter et Wee oe Tabniesee 8. Cophyla, Btte. 
Platyhyla grandis. 
Series of palatine teeth forming together an obtuse angle, 
* The so-called vomerine teeth are inserted on the palatine bones in 
the Dyscophide, 
