RHINOLOPHUS 



227 



within its arms. The median section or sella commences behind 

 or between the nostrils, and from a recumbent anterior portion 

 rises posteriorly into an erect, horn-like, connecting process, 

 standing vertically upon the face. From the sella there runs 

 backwards a process connecting it with the posterior section or 

 lancet, which is tongue-shaped and terminates posteriorly in a 

 single point. 



The wing, which arises from the ankle, is very large 

 and broad, the fifth metacarpal being longer than the 

 third : the area between digits two and three is large, and the 

 base of the thumb is included in the antebrachial membrane. 

 The second digit has one joint only, the metacarpal ; the third 

 three, the metacarpal and two phalanges. The first toe has 

 two joints, the remainder three each. 



In addition to the single pair of pectoral mammae the 

 females are provided with two nipple-shaped prominences in 

 front of the pubis, to which the young 

 attach themselves by their teeth. 

 These false nipples produce no secre- 

 tion, and are not in communication 

 with any gland : they are attached by 

 fibrous tissue to the pubis (see Rol- 

 linat and Trouessart, Mdm. Soc. Zool. 

 de France, x., 1897, 124). 



The teeth (Figs. 25 and 26) are 

 thirty- two, arranged as — 



c:^ 



.1 - 1 



I -1' 



pm 



3-3' 



3- ^ 

 m - — ^= 32. 



3-3 



Fig. 24. — Front View of In- 

 cisors AND Canines of Rhino- 

 lophus (enlarged and diagrammatic). 



The lower incisors are tricuspid. 

 The upper incisors, although minute, 

 are always present in the always 

 ossified premaxillse. The anterior 

 upper premolar is minute, and often 

 crowded out of the tooth-line exter- 

 nally by the large canine and posterior premolar. The central 

 lower premolar is often in similar position between the neigh- 

 bouring teeth. The molars are well-developed and their cusps 

 acutely W-shaped. The milk teeth undergo absorption in the 

 embryo. 



