1. MANTELLA. 141 
1. MANTELLA. 
Pupil horizontal. Tongue elongate, free and distinctly nicked 
behind. Tympanum distinct. Fingers and toes free, the tips 
dilated into regular disks. Outer metatarsals united. Omosternum 
and sternum with a bony style. Terminal phalanges T-shaped. 
Madagascar. 
1. Mantella betsileo. 
Dendrobates betsileo, Grandid. Ann. Se. Nat. (5) xv. art. 20, p. 11. 
Snout subacuminate, as long as the diameter of the eye, with 
angular canthus rostralis ; loreal region vertical; interorbital space 
broader than the upper eyelid; tympanum more or less distinct, 
about half the width of the eye. Fingers rather slender, first not 
extending as far as second ; toes moderate, tips of fingers and toes 
dilated into small disks ; subarticular tubercles distinct; two small 
metatarsal tubercles. The hind limb being carried forwards along 
the body, the tarso-metatarsal articulation marks the eye or the tip 
of the snout. Skin of back minutely granulate; a more or less 
distinct fold from the eye to the shoulder. Upper surface of head 
and back uniform light olive, sides and lower surfaces black, the two 
colours sharply defined; limbs dark olive, indistinctly barred with 
darker ; a light line on the upper lip, extending to the base of the 
arm ; lower surfaces spotted with light olive. 
Madagascar. 
a-d. 2 & her. Mohambo. 
2. Mantella ebenaui. 
Dendrobates ebenaui, Boettg. Zool. Anz. 1880, p. 281. 
Head short, subtriangular; tympanum half the size of the eye. 
First and second fingers equal; tips of fingers and toes dilated into 
very small disks ; subarticular tubercles well developed; two meta- 
tarsal tubercles. Skin of back minutely granulate. Above with a 
broad light zone—silvery in the male, greenish golden in the 
female.—well defined from the black colour of the sides; limbs dark 
grey, with rather indistinct black spots and stripes ; a silyery-white 
line round the upper lip, extending to the base of the arm; beneath 
black, white-spotted. 
Nossi Be. 
3. Mantella madagascariensis. 
Dendrobates madagascariensis, Grandid. 1. ce. p. 10. 
Skin finely shagreened. Male uniform bluish black; belly with 
light blue spots; thighs and inner side of legs beautiful red. 
Female deep black, with a light-green spot at the base and in front 
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