740 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxx. 



erably above level of alveolar line, and posterior overhang of occiput 

 is only about one-fourth occipital height through condyle (see lig. 1); 

 ratios to basal length: of profile length, about 117; of height of skull 

 when resting on mandibles, about 60; posterior molar both above and 

 below long, the upper tooth containing a compressed anterior median 

 ridge, a middle median ridge, and a large terminal median heel in 

 addition to two well-developed bicusped cross ridges, the lower tooth 

 containing three large bicusped cross ridges and three smaller median 

 ridges, the last of which forms the terminal heel (Plate XLIX, fig. 1.) 



Measurements. — For measurements see table, pages 755 and 756. 



/Specimens examhied. — Twenty-seven skulls of adults and two 

 mounted specimens from the following localities: Borneo, Banjer- 

 massing, 2 (1 mounted; Le3'den); southeastern Borneo, 4 (Berlin, 

 High School); Darvel Bay, 11 (Berlin, Museum); Maruda Ba}^ 2 

 (Berlin, Museum); Marude, Sarawak, 1 (British Museum); Baram, 3 

 (British Museum); near Sandakan (skull and mounted skin; U. S. 

 National Museum); no exact locality, 1 (British Museum); Java, no 

 exact locality, 2 (Ley den). 



Remarks. — The series of skulls examined show that the cranial and 

 dental characters of Sus harhatns are not subject to any remarkable 

 variation. The upper length in adult males ranges from 450 to 490 

 mm., the larger skulls occurring among the older individuals. The 

 zygomatic breadth ranges from 156 to 178 mm. The principal varia- 

 tions in form are due to the greater or less angle in the facial profile at 

 posterior extremity of nasals and to slight differences in the width of 

 the rostrum. The Javan skulls show no appreciable differences from 

 the Bornean specimens. ** The type of Sus longirostris agrees perfectly 

 with the other skulls except for two slight peculiarities: The zygoma 

 below and in front of orbit is distinctly concave instead of swollen and 

 convex, and the edge of the ridge above tusks is more noticeably 

 thickened and turned inward than in an}" other specimen that I have 

 seen.. 



In the type of Sus harhatus (an adult female) the protuberances on 

 the muzzle can scarcely be detected. Their position is, however, clearl}" 

 indicated by the usual tufts of bristles, and without doubt their appar- 

 ent absence is due to the treatment that the skin received in the process 

 of mounting. This peculiarity of the original specimen is responsible 

 for much of the confusion which has arisen with regard to the specific 

 characters of the members of this group. It caused Miiller to over- 

 look the protuberances in describing Sus harhatus^ and hence led Nehr- 



« Their .similarity to specimens from Borneo is so perfect as to suggest that they 

 may have been taken in that island. Diard worked in both Java and Borneo and 

 obtained Stis harhatua near Pontianak (see Jentink, Notes from the Leyden Museum, 

 XXIV, p. 164). It is therefore by no means impossible that an error in labeling 

 may have occurred. 



