380 ROBERT COLLETT, 



the tail quite black. The younger male is a little paler on the upper 

 side, but also in this the colour of the bind legs is very dark, and the 

 feet, the outside of the ears, and the tail are quite black. 



The female (A) is of a pale slaty grey with whitish belly; the 

 tail is light greyish brown, like the feet, and only the toes are black. 

 The outer side of the ear is coloured like the back; at the base of 

 the inner margin is a little reddish yellow spot. 



Length of ear (raeasured along its inner margin): — A 112 mm, 

 B 120 mm, C 120 mm. 



Length of bind foot (from heel to tip of claw): — A 260 mm, 

 300 mm, C 325 mm. 



Length of tail: — A 605 mm, B 730 mm, C 880 mm. 



H. robustus belongs, like H. parryi, to the most long-eared 

 species. The length of the ear is thus about equal to its distance 

 from the angle of the mouth. The tail is thick, and of medium length. 



Thus in the three present specimens is contained: 



The ear in the length of the bind foot : — A 2,32, B 2,50, C 2,50. 



The skull in the length of the bind foot : — A 1,79, B 1,82, C 1,74. 



The bind foot in the length of the tail : — A 2,32, B 2,43, C 2,70. 



The skull. 



A. Length 145 mm, Breadth 80 mm, Length of lower jaw 110 mm 



B. „ 164 „ „ 89 „ „ „ „ „ 124 „ 



C. „ 186 „ „ 98 „ ,, „ „ ,, 143 „ 

 The frontal crests, which in both of the younger specimens run 



about parallel, or are but slightly converging towards the occipital 

 crest, unite very soon in the largest male, and form a high and sharp 

 sagittal crest. The orbital margins gradually converge backwards, 

 without forming a trace of proc. postorbitalis; the orbital walls are 

 smooth, without protuberance, as in M. giganteus. The proc. zygo- 

 maticus of the os temporale is broadest across the centre. 



Foramina palatina are wanting, but some punctured openings are 

 found on the sides of the ossa palatina. 



The foramina incisiva in this, like as in the following species of 

 Halmaturus, touch with their posterior margin the maxillaria , but 

 are, however, entirely formed of the intermaxillaria. The youngest 

 (and not fully grown) specimen had two smaller foramina in the middle 

 of the palatal part of the maxillaria. 



The condylus of the lower jaw is in all the specimens convex. 



The teeth. 



The dentition is normal in the fullgrown specimen (C): 

 c h P h m i (28). 



