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Show 1876.] MR. G. E. DOBSON ON THE MOLOSSI. 705 the extremity projecting very considerably beyond the lower jaw. An enormous gular sac extends half round the neck beneath. Into this sac the oily secretion of glands situated between the internal origins of the pectoral muscles is discharged, in males by a series of small pores collected in two circular slightly elevated patches, in females by a single large orifice. First toe very thick, thinly covered with long curved hairs on the outer side; this toe is separated from the others like a thumb, and is probably opposable to them. Wing-membrane from the middle of the tibia, and from the sides of the back near the spine. A deep axillary pouch is formed, in both male and female, by an extension of a fold of skin, derived from the thick integument covering the breast and sides of the body, to the inferior surface of the humerus, and, longitudinally, to the femur. In the anterior part of this pouch, on the side of the body, behind the axilla, the m a m m a is placed. Tail very thick and long, projecting more than half its length beyond the short interfemoral membrane. Integument very thick and almost quite naked, with strong plications along lines of flexure and extension ; the back is quite naked ; but a collar of very short thinly spread hairs nearly surrounds the neck. Upper incisors strong, placed close together, their extremities converging inwards; the single upper premolar large and tricuspidate ; first lower premolar minute, wedged in in the space between the canine and second premolar, which are close together; the last upper molar less than half the size of the second molar. Length: head and body 5"*3 ; tail 2"*6 ; head 1"*8 ; ear 1"*2, tragus 0"*15 ; forearm 3"*1 ; thumb 0"*8; second finger 7" ; third finger 5"*6; fourth finger 3"*1 ; tibia l"*4; foot and claws 1"*05. Hab. Malay peninsula (Pinang, Singapore), Sumatra, Java, Borneo. Genus M O L O S S U S. Molossus, Geoffroy, Annal. du Mus. vi. (1805), p. 154 ; Peters, Monatsb. Akad. Berl. 1865, p. 574. Dysopes, Illiger, Prodr. Syst. Mammal. (1811), p. 122. Ears close together, or united at the bases of their inner margins ; tragus very short, sometimes minute ; extremity of the muzzle broad, obtuse, or very obliquely truncated ; lips smooth or with very indistinct vertical wrinkles ; first and fifth toes much thicker than the others, the backs of all the toes with long curved hairs. -r. • . T 2 2 n, 1-1 TJ 1-1 2-2 l\/r 3-3 Dentition.-Inc. ^ or -^ C. I=l, Pm. ^ or -^-^, M . 3^3. Premaxillary bones well developed, united ; upper incisors strong, their inner margins close together in front; first minute upper premolar generally external to the tooth-row or absent; first lower premolar half the size of the second, standing in the tooth-row (except in M. rufus, where it is partly internal and concealed by the closely approximated second premolar). Range.-Tropical and subtropical regions of America. |