542 On Sus verrucosus, Mull, (fc Schhg., and Allies. 



I do not propose to enter here into a detailed description 

 of the differences between the harhatus and the verrucosus 

 group. It may suflSce to point out the greater length in 

 harhatus of that part of the upper surface of the cranium 

 situated behind a line connecting the postorbital processes 

 (no. 18 J of table of measurements), as well as the superior 

 length, compared with verrucosus, of the bony palate of 

 harhatus (nos. 4 a, 18 i), whereas the length between the 

 foramen magnum and posterior end of the vomer is shortened 

 in proportion *. Some variation in this respect occurs in the 

 verrucosus group (see measurements). Another point of 

 difference between the two groups, which strikes at once, is 

 the height of the skull (no. 15), even those members of the 

 verrucosus group which possess the lowest skull [inindanen- 

 sis — ceramicus) remaining considerably above those of the 

 harhatus group. 



The harhatus skull, besides being very elongate — the inter- 

 maxilla, however, is relatively short — is also narrow, as 

 compared with verrucosus (see nos. 6, 7, 9, 14, 33). As to 

 the width of the cranium, between the zygomatic arches, 

 there occurs a considerable amount of variation in the various 

 members of the larhatus group. The female skulls alone would 

 not have justified the separation of the Balabac form from 

 that of Palawan ; but in the breadth of the male skulls a 

 considerjible difference is to be noticed. The adult male of 

 Palawan f, though having a shorter skull than the male from 

 Balabac — P. = oU5, B.="313 — has a breadth of 145 millim. 

 against 125 as shown by B. ; the immature type of 

 "/S. aha^noharhus " already surpasses B. in this respect. 



S. harh. calamianensis also has a much broader skull than 

 the Balabac form ; length of skull from Culion 315, breadth 

 147 millim. \ ; the same appears from the tigure given by 

 Heude§. 



Tables are given (p|). 536-541) of measurements to which 

 relerence has already been made in the text. The measure- 

 ments are mostly those used by Nathusius (' Vorstudien ') and 

 by Kiitimeyer {I. c), with some alterations proposed by 

 Nehring (' Ueber Sus celthensis und Verwandte'), to whose 

 tables most of the numbers pretixed reter. 



• See NeliriiigV various papers on " <S'. /««<7i>a"7r/.<.'' Zool. Anz. l{58o, 

 Sitzungsber. Ges. naturf. Vr. 188(5, p. 80, as well " Ueb<M- Su« celtbensis 

 und Verwandte," /. c. ] j). 18-20; Ileude, /. c. ii. 1894, p. 2lM, pi. xl. IJg. 5 ; 

 Neliiinp, Zool. tiarteu, xxxvi. l(*9o, p. 411 and tig. 1. 



t Nehriiip, Sitzung^ler. Lies, naturf. Fr. l8U4, p. '1'2\. 



t Nehring, ibid. lb'J4, p. 192. 



§ /.. c. pi. xl. tijr. 1. 



