1881.] Himalayas, Tibet, and Afghanistan. 101 



a very little deeper and somewhat broader than that between the first and 

 second. The posterior portion of the tooth is a nearly oval longitudinal 

 lobe, forming rather more than one third the length, more prominent 

 externally than internally, so as to form a blunt third external angle, but 

 not sufficiently prominent on the inner side to form a third inner saliency. 

 The spaces or prisms of a tooth like this are always somewhat indefinite ; 

 the first space is enclosed by the anterior outer and the corresponding inner 

 angle ; the second is not separated -from the first, and is enclosed by the 

 second outer angle, the third by the second inner angle, and the fourth 

 corresponds to the posterior lobe. 



In the first lower molar the first three spaces are confluent, and so are 

 the fourth and fifth. The anterior outer and inner angles project less than 

 those behind ; the first inner angle especially, which is close to the extre- 

 mity of the tooth, and much in advance of the first outer angle, is weak 

 and rounded ; these two anterior angles enclose the first space, which is 

 oblong-ovate, with its longer diameter diagonally placed. The third inner 

 and outer angles are so nearly opposite to each other that it is almost a 

 question whether the two spaces they enclose should not be considered as 

 one. In the secend and third lower molars all the spaces are lozenge- 

 shaped, the outer and inner angles being nearly or quite opposite to each, 

 other, and each space being bounded both by an exterior and an interior 

 angle. The outer external angles of the third lower molar are rather less 

 prominent than the inner. The third molar is considerably narrower than 

 the second, and the second somewhat narrower than the first. 



The interparietal bone is subtriangular. The hinder margin, neglect- 

 ing small projections and emarginations, runs nearly straight, and consists 

 of two slightly concave halves meeting in a trifling angle, projecting in the 

 middle ; the anterior margin is formed by two almost straight lines meet- 

 ing in the middle of the skull at an angle a little more open than a right 

 angle, without any point projecting anteriorly beyond the angle. The 

 nasals in the only skull I have extracted are slightly injured behind, so I 

 cannot determine the shape of the posterior extremity ; the outer edge of 

 each appears to be convex throughout, not emarginate posteriorly. 



The following are the dimensions of a skull :— 



inches. 



Length from occipital plane to end of nasals 1'14 



„ of nasals < * » 0'3 ^ 



Breadth across widest parts of zygomatic arches 0*74 



between orbits where narrowest 0-18 



of nasal bones in front ...» 0*14 



., of interparietal bone 0*23 



Length of upper molars together , 0'28 



14 



it 



