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Show 1876.] MR. G. E. DOBSON ON THE MOLOSSI. 715 the inner margin of the ear-conch reaches to within one tenth of an inch from the extremity of the muzzle; inner margins of the ears united by their bases on the muzzle at a point nearer to the extremity of the nose than to the anterior commissure of the eyelids ; outer and inner margins of the conch regularly convex ; antitragus separated by a deep and narrow emargination, commencing anteriorly in a plane slightly above the angle of the mouth, tragus small, quadrate, superior margin straight, outer and inner margins concave, no projecting lobule at the base of the outer margin; keel of the ear-conch as in M. perotis, terminating posteriorly and inferiorly in a deep, thick, flattened ridge, which is in the same perpendicular line with, and almost touches the antitragus. A smaller gular sac in 6*, rudimentary in $ , opening directed downwards and slightly forwards. Wings from the ankles ; distribution of fur upon the wing-membranes as in M. perotis ; above, light brown at the base of the hairs, then chestnut-brown, the extreme tips greyish, so that the upper surface appears altogether grey ; beneath similarly coloured but much paler. Upper and low er incisors as in M. perotis; the first upper premolar scarcely elevated above the gum, in the centre of the space between the canine and second premolar. Length (of an adult $ ) : head and body 3"*1 ; tail 2"*15, tail free from membrane 1"*0; head 1"*2; ear 0"*9, tragus 0""12; forearm 2"*35 ; thumb 0"*35 ; second finger-metacarp. 2"*35, 1st ph. 1"*0, 2nd ph. 1"*2 ; third finger-metacarp. 2"*25, 1st ph. 0"*85, 2nd ph. 0"*3 ; fourth finger-metacarp. 1"*2, 1st ph. 0"*75, 2nd ph. 0"35 ; tibia 0"*8 ; foot and claws 0"*5. Hab. Brazil (Mato Grosso) ; Surinam ; Jamaica; Cuba. 9. MOLOSSUS BONARIENSIS. Promops bonariensis, Peters, Mon. Akad. Berl. 1874, p. 232 (fig., pl.). Ears united by a deeper band than in M. glaucinus; ear-conch as broad as high; antitragus broader than high, convex; tragus quadrate, as in the preceding species. Muzzle obliquely truncated, extremity of the nose almost double as broad as the base of the antitragus; upper lip with a few shallow vertical wrinkles. Wing-membrane from the ankles. Fur rather short, somewhat shorter above than beneath. Beneath, the wing-membrane is covered as far as a line drawn from the middle of the humerus to the knee; a few short hairs extend along the posterior margin of the forearm. Above, the outer half of the ante-branchial membrane is covered with short woolly hairs; and a band of similar hairs passes outwards behind the forearm, becoming gradually so broad as to cover almost half the metacarpal bone of the last finger. Above, reddish brown, the base of the hairs whitish; paler beneath, the extremities of the hairs brownish white. The skull agrees in size with that of M. nasutus, Spixj but the facial portion is much longer, and the brain-case wider than in thai |