284 PROF. ROLLESTON ON THE DOMESTIC PIG 



Length of lacrymal along malar suture 8 mm. 



Length of molar series 2-0 inches. 



Length of premolar series 1'3 inch. 



Plate XLIL 



Fig. 4. Skull of Wild Indian Sow, Sus cristatus, British Museum. See ' Catalogue of Carnivorous, 

 Pachydermatous, and Edentate Mammalia/ 1869, p. 334 (where this skull is catalogued as 

 " 716 m. Skull of young female. Length lOf, height 1\ inches. Terai, Nepal; Dr. Oldham "), 

 or Hand- List, published 1873, p. 64. 



This skull has been figured to show the points in which it contrasts with the British pig's 

 skull (figure 1) on the one hand, as to racial characters, and with the Indian boar's skull (figure 

 6) as to sexual characters, agreeing, as it does, with the one as to sex, and with the other as 

 to age. 



It is, as may be seen by constructing two triangles with the three first measurements given 

 of it and of that of Sus cristatus (fig. 6) respectively, a very much smaller skull than that ; 

 the principal points, however, enumerated in the description of that skull, as differentiating 

 it from Sus scrofa, can be recognized in its smaller contours. The third molar in the upper 

 jaw has the part posterior to its second principal lobe much smaller relatively and absolutely 

 than is the case in Boars of Sus cristatus ; this posterior factor, however, effloresces into as 

 many as 7 cusps in the upper and 5 in the lower jaw of this specimen. 



Measurements of Sltull 716 m, British Museum Collection. Sus cristatus, from 



Terai, Nepal. 



inches. 

 Length of lacrymal along malar suture - 75 

 Interpremolar transverse diameter of 



palate 1'6 



Intermolar 1'75 



inches. 



Extreme length H'2 



Extreme height 4 - 3 



Base-line 1° 



Height of lacrymal along rim of orbit l'l 

 Fig. 5. Skull of Wild Boar, Sus scrofa, var. ferus, from Germany. No. 1513 a, Oxford University Museum. 

 The entire dentition was in place ; the portion of the third molar which is posterior to the four 

 primary cones is very small as compared either with the rest of the tooth or with its homologue 

 in the Indian Wild Boar (fig. 6). It is, however, considerably in front at a line drawn as a 

 perpendicular to the plane of the cutting-edges of the molars from the lacrymal canal. This 

 skull differs markedly from the skull just named in the greater length, relatively to the 

 height, of its lacrymal bone, in the greater length of its nasals relatively to the length of the 

 fronto-parietal region, in the absence of any great convexity in the part of the frontal abutting 

 upon the lacrymal, and in the convexity backwards of its fronto-nasal suture. 



Measurements of Skull of German Wild Boar, no. 1513 a, Oxford University Museum. 



inches. 



Extreme length 16 - 5 



Extreme height 5T 



Base-line from anterior margin of fora- 

 men magnum to apex of intermaxil- 



laries 14'0 



Length of nasals, approximatively . 8-0 



Fronto-parietal length in vertical aspect 6 - 8 



inches. 



Width of nasals 13 



Maximum interzygomatic width . . 5 9 

 Maximum frontal (interectorbital) 



width 4-2 



Height of lacrymal along rim of orbit 1-0 



Length of lacrymal along malar suture 1"2 



