18/6.] MR. G. E. DOBSON ON THE MOLOSSI. "2/ 



Nyctinomus (Chcerephon) johorensis, Dobson, Journ. Asiat. Soc. 

 Beng. 1874, p. 144. 



Nyctinomus johorensis, Dobson, Monogr. Asiat. Chiroptera, p. 183 

 (1876). 



Ears as in N. plicatus ; but their inner'margins are connected by a 

 band of integument which extends forwards on the muzzle as far as 

 a point placed midway between a line joining the eyes and the ex- 

 Fig. 5. 



Head of N. johorensis, 



tremity of the muzzle ; this connecting band is continued upwards 

 and backwards between the ears to a height of 0""4 inch, forming an 

 incomplete funnel open behind, wide below, and narrow above. At 

 a distance of about 0" # 3 inch from the anterior connecting band, the 

 ears are again connected by a second fold of integument, posterior 

 and parallel to the first, about 0" 1 ! inch in vertical height (fig. 5). 

 Between these two connecting folds of integument and the sides of 

 the ear a hollow square is contained. This concavity is empty, and 

 open only from above. At the base of the funnel-shaped an- 

 terior boundary a few long hairs exist, as in N. pumilus. Margin 

 of the ear-conch evenly convex above ; antitragus large, separated by 

 a deep notch ; tragus very small, quadrate, superior margin slightly 

 concave. 



The animals of this genus possess the power of folding the ear- 

 conch forwards, downwards, and outwards, thus closing the external 

 ear. When the ears are closed, the superior part of the funnel- 

 shaped connecting band is, in this species, drawn forwards, disclosing 

 the cavity behind. In the erect condition of the ears the same fun- 

 nel-shaped process is drawn backwards across this square hollow 

 cavity, which it covers, as the pitcher of Nepenthes is covered by the 

 leaf forming its lid. In this position the extremity of the funnel is 

 flattened out, and lies in the space contained between the posterior 

 connecting band and the top of the head. 



The thumb is comparatively longer than in any other species of 

 the genus, and the wing-membrane is attached a short distance 

 below the knee-joint. 



Upper incisors separated by a very narrow interval in front ; lower 

 incisors 4. 



18* 



