58 
Annals of the Transvaal Museum 
distinct from those here described, we suppose that our specimens relate 
to a species hitherto unknown : further, judging from the description in 
the British Museum catalogue, M. betsileo differs from this new form in 
possessing “ back minutely granulate ” and in colour pattern (cf. especially 
the white line along the upper lip in betsileo ) : moreover, the new 
species would seem to be quite distinct in the large size of the discs of the 
fingers. 
Description. — Snout subacuminate, about as long as the diameter of 
the orbit : loreal region about vertical : ccmthus rostralis somewhat 
rounded : interorbital space broader than upper eyelid : tympanum more 
or less distinct, about two-fifths the diameter of the eye. 
Fingers not as slender as in ebenaui : first not extending so far as the 
second. Toes moderate : tips of fingers and toes dilated into discs, those 
a b 
Text Fig. 4. — Left hand from above of (a) Mantella laevigata , (V) M. ebanaui. 
on the second, third, and fourth fingers comparatively large, greatest 
breadth of that on the third about equal to the diameter of the tympanum : 
discs on the toes of moderate size : subart.icular tubercles of fingers and 
toes fairly prominent : both inner and outer metatarsal tubercles are 
present. 
Hind limb carried forward along the body, the tibio-tarsal articulation 
reaches the eye. 
Upper and lower surfaces of body and limbs entirely smooth, except 
the thighs which on the under surface have the appearance of being paved 
with large flattened granules. 
Colour. — Upper surface of head and anterior half of the back shot 
with silver grey and olive, the sides and limbs blue-black, the two colours 
merging on the posterior half of the back : on the belly some light spots 
occur, and a few elongated light markings on the inner sides of the tibiae : 
throat and upper lip entirely black without any pale markings. 
The largest specimen measures from snout to vent 25 mm. 
Type, No. 1214, in the Transvaal Museum. 1212, 1214-1219. 
Family ENGISTOMATIDAE. 
Sub-Family Engistomatinae. 
Genus CalophrynuS, Tschudi. 
C. CALCARATUS, Mocq. Seven examples from the. south- west region ; 
localities, Antolanbiby (near Betsioky) and the Sakamena River between 
Betsioky and Ejeda. 
Our specimens appear to be specifically identical with this species, 
but as they exhibit some characters which are not referred to by 
Mocquard in his description ( 11 , p. 108), we have thought it best to give 
a full description drawn up from our examples. 
