202 



\n:i;i-i i VARIATION. 



[PART i. 



i,.,r m t. have been broken, but there appears to have been disease 



of tin- .-irii. -illations of the mandibles. 15. -M., *G, 12, 20, 10. 

 17 Sj-.-.-inii-M in which "position of the left upper canine is abnormal. 



IT i- displaced l..i.-k wards and lies to the outer side of the tirst premoln. 

 wlii.-Ii it ha- j.u.-du'd towards the middle line." C. S. M.. 41 (see 



< '.it, if.. If,,, |. 



177. < -i whi.-h upper right canine occupies a position within and on 



a level with the tirst premolar, which is pushed outwards. C. S. M., 



. .1. 



Troglodytes niger, calvus, c. (Chimpanzee). 



\ nn;il adult skulls seen, 35. 

 > y.. rnunu /'/// molnrs. 



178 Specimen having on right side in upper jaw a very small 

 square tool h behind /// ', in the arcade (Fig. 35) ; and in the left upper 



I 



l'i',. '.''>. I'.'-t. ii<>r iu'ht upper molars of Chirnpauzee. 



I. The ear-r No. 17^ (<:,ll. S,ir : i. Mug., No. 1). 



II. A ninn;il CuiiH]' mx.ee of approximately the same size. 



jaw .-in .-mpty aUvolus in the similar plact-, shewing clearly that 



-imilar tu..th lias lic.'ii j.iv-,-nt : lower jaw iiurmal. C. S. M., 1. 

 17 ' Sp.-cinn-ii in which ti-fth all ;_;<>nc', but alveoli exist behind 

 th'isi- i.f tin- normal ti-rth on both sides in upper jaw, and there 

 is little doubt that there was here a fourth molar on each side. 

 C. S. M.. !). 



S|ieeiiiien in \\liieh teeth all goiii-, luit alveoli shew clearly that 

 theiv was a toiirtli upper molar on right side; evidence on left 

 side inconclusive : lower jaw gone. <\ S. M.. 12. 



Specimen ,,\' '/'. calvus having an extra ,7"' in lower jaw on 

 right side. Tins to..th is about one ijuarter of' the size of m?, 

 ie-,-mb|ii IL> r that in case No. 17s. Thi^ -pecimen is in the private 

 collection . .(' I'IM)'. MILM: KDWAKDS, who was so kind as to shew 

 it to mi- 

 Gorilla savagei i < i-rilla). 

 Normal a!ult -kull- seen, "'"'. 



