SUS-STUDIES. 171 



"iu all the other species there are so mauy individual 

 "differences in the shape of the skull, that nay in a series 

 "of about twenty skulls it may be called a difiScult task 

 "to find out two skulls exactly agreeing in all details; it 

 "therefore is very difficult to describe other characteristics 

 "as the above exhibited." In other words: Schlegel and 

 Muller considered the short and broad skull to be a not 

 so adult form of the same species as the elongated and 

 slender skull, an opinion accepted in my "Catalogue oste- 

 ologique, 1887" and persevered in my first correspondence 

 with Prof. Nehring, who had ventilated the idea that this 

 elongated skull merely was a skull of his Sus longirostris ; 

 later on I studied the questioned skull closer and wrote 

 to Prof. Nehring that I was convinced that the skull was 

 a very old Sus harbatus-sk\xW, and that therefore iu my 

 view Nehring's longirostris was merely a very old Sus 

 barbatus. Besides this skull we possess an other still older 

 one, with more used molars, agreeing in shape entirely 

 with the mentioned elongated elegant skull, figured by 

 Muller and Schlegel, presenting the elevated crest as well 

 as the other characteristics ; both skulls present the poste- 

 riorly extended bony palate together with the above des- 

 cribed characteristics of Sus barbatus; both skulls have 

 been collected by Diard in Java. The differences between 

 the skulls of barbatus and verrucosus iudeed are very radical, 

 as will be seen from the following description of our 

 skulls of the latter species. 



Skull of Sus verrucosus^ figured in the » Verhandelingen", 

 Tab. 32, figs, 3 and 4. The total impression is that the 

 skull is short, compact and broad ; malar bones very thick 

 and broad, inflate; lacrymal strongly developed; the latter 

 forms with the posterior part of the maxilla a deep hole, 

 separated from an other deep concavity by the sharp crista 

 of the maxilla; this crista ends rather abruptly compared 

 with the maxillar-crista in the Sus barbatus skull, which 

 runs sloping towards the infraorbital foramen ; meanwhile 

 in all the other species there is on each maxilla a single 



Notes from tlie Leyden Miuseucn, Vol. XX.VI. 



12 



