246 Mr. G. A. Boulenger on new 
under the thighs ; no dorso-lateral fold. Dark brown above, 
with small lighter spots; two whitish streaks from below the 
eye to the labial border ; limbs with black cross bands edged 
with whitish ; throat brown, closely spotted with black and 
with a black longitudinal streak on each side; labial border 
black, with white dots; belly and lower surface of limbs 
whitish, with numerous small black spots. Male with in- 
ternal vocal sacs. 
From snout to vent 47 millim. 
A single male specimen. 
Rana biporus. 
Vomerine teeth in two small groups behind the level of the 
choane. Habit stout. Head short; snout rounded, a little 
shorter than the diameter of the orbit; nostril a little nearer 
the end of the snout than the eye; canthus rostralis obtuse ; 
loreal region slightly concave; interorbital space narrower 
than the upper eyelid; tympanum distinct, two thirds or 
three fourths the diameter ot the eye. Fingers moderate, 
first and second equal; toes moderate, half-webbed; tips of 
fingers and toes dilated into small disks; subarticular 
tubercles small ; a small inner metatarsal tubercle. The tibio- 
tarsal articulation reaches the eye ; tibia two thirds the length 
of the vertebral column. Skin smooth ; no dorso-lateral fold ; 
a pair of circular flat glands, each with a median impression, 
under each thigh near its proximal extremity. Dark brown 
above, with or without a light vertebral line; a more or less 
distinct, angular, black cross band between the eyes, light- 
edged anteriorly; sides with white dots; limbs with very 
indistinct black cross bars; lower parts white, throat mottled 
or marbled with black. Male with internal vocal sacs. 
From snout to vent 36 millim. 
Several specimens. 
The name given to this small species refers to the curious 
femoral glands, which are more developed in males than in 
females, and may prove homologous with the femoral pores 
of lizards. Such glands were first noticed in some Madagascar 
frogs (Rana ulcerosa, guttulata, femoralis) by Dr. Beettger and 
myself ; these frogs, however, differ from 2. d¢porus in having 
but a single gland on each side. A recent examination of 
_the types of Polypedates lugubris, A. Dum., has convinced 
me of its identity with Rana femoralis, which must therefore 
bear the name Rana lugubris. 
I also find that Polypedates dispar, Bttg., is identical with 
P. tephreeomystax, A. Dum., from Nossi Bé. 
