OF PREHISTORIC TIMES IN BRITAIN. 283 



Iffley Skull. Torfschwein. 

 inches. inches. 



Length from anterior border of orbit to posterior 1*4 — 



Greatest width of occiput 2 - 4 — 



Breadth of nasal at commencement of naso-frontal suture, which 



is point of maximum width of nasals 1*1 — 



Maximum width of intermaxillaries 1-3 — 



Height of lacrymal along rim of orbit 17 millims. 



Length of lacrymal along malar suture 18 millims. 



Fig. 3. Sus andamanensis. 1514 6, Oxford University Museum, adult $ . 



The skull from which this drawing was taken was that of a Wild Sow from the Andaman 

 Islands, procured for me by my friend J. Wood-Mason, F.G.S., of the Calcutta Museum. It is 

 about the same size as the two prehistoric British skulls, figured figs. 1 and 2, and as the 

 " Torfschwein " of Rutimeyer — resembling this latter in the one important particular, that of 

 its long fronto-parietal region, in which it differs from the British skull (fig. 2). It differs 

 from all the pigs' skulls here figured in the exaggeratedly disproportionate shortness of the 

 malar border of its lacrymal bone, which is, as in the newly born European pig, little more 

 than half the length of the orbital border. In its convex frontal region we have, again, a 

 character retained in the adult Asiatic which is transitorily represented in the European pig. This 

 convexity of the frouto-lacrymal ridge is well marked and, like the straight naso-frontal suture 

 and the two other peculiarities specified, serves to differentiate Sus andamanensis from specimens 

 of similar size from the Palaearctic region, and to show that it is a member of the group repre- 

 sented by Sus cristatus. Again, this skull resembles Sus cristatus and differs from Sus scrofa 

 in being somewhat shorter, and having the paroccipitals, temporal bullae, and pterygoid processes 

 more crowded together. The length of the nasals is a little less than that of the fronto- 

 parietal region in the vertical aspect, as is often, though not always, the case in Sus cristatus, 

 though very rarely, if ever, in Sus scrofa. 



Measurements of Skull of Sus andamanensis, female. 



inches. 



Greatest frontal width between ectorbital processes 3 - 3 



Least width on vertex 0*8 



Greatest interzygomatic width 4 - 65 



Height of occiput from inferior border of foramen magnum 3'7 



Length of vertex from level of supraorbital foramina to middle of occipital ridge 4*5 



Horizontal distance from anterior border of orbit to temporal ridge .... 3 - 05 



Length of intermaxillary along alveolar border 2'0 



Maximum length of skull from apex of intermaxillaries 108 



Length of nasals 5 



Length from apex of intermaxillaries to anterior edge of foramen magnum . . 91 



Length from apex of frontal to middle of occipital ridge 595 



Length from middle of fronto-nasal suture to middle of occipital ridge .... 5"5 



Length from anterior border of orbit to posterior 1-5 



Greatest width of occiput 2*5 



Breadth of nasals at commencement of naso-frontal suture, which is the broadest 



part of nasals 1 "0 



. Maximum width of intermaxillary region 1*2 



Height of lacrymal along rim of orbit , . . • . 17 mm. 



SECOND SERIES.— ZOOLOGY, VOL. I. 2 P 



