18/6*.] MR. G. K. 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 mamma 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 plica- 

 tions 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 con- 

 verging 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 l"-8 ; ear l"-2, 

 tragus 0"T5 ; forearm 3" 1 ; thumb 0"*8; second finger 7" ; third 

 finger 5"'6 ; fourth finger 3"'l ; tibia I "-4; foot and claws l" - 05. 



Hab. Malay peninsula (Pinang, Singapore), Sumatra, Java, 

 Borneo. 



Genus Molossus. 



Molossus, Geoffroy, Annal. du Mus. vi. (1805), p. 154 ; Peters, 

 Monatsb. Akad. Berl. 1865, p. 574. 



Dysopes, llliger, 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 in- 

 distinct vertical wrinkles ; first and fifth toes much thicker than the 

 others, the backs of all the toes with long curved hairs. 



Dentition. — Inc. ^ or ^, C. j^, Pm. ^ or jr^s, M. 



-3 

 3—3* 



Premaxillary bones well developed, united ; upper incisors strong, 

 their inner margins close together in front ; first minute upper pre- 

 molar 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. 



