MERISTH VARIATION. 



[PART i. 



in-t-ad . .f l.i-iii^ posterior to it as u.sual. Outside this tooth i> 



iii-tli- i -tan. ling out of the arcade, having the size and almost the 



Mm -I normal m 3 . I!. M.. 740, c. (Fig. 39). 



Th may be an example of one of two principles which 



will 1,.- in The next chapter pointed out as operating in the case 



lM)7 



2o:i. 



I' i'.. .;'.'. ."'/;/< '<* niijer, No. 200; right upper molars. Lrit. Mus., 749, c. 



I dfiiial \'ariati<in. Either in' may have divided into two, both 

 -landing in series, and the normal m 3 may have been pushed out 



f tlh- aivad.- iii I'nimexion with this reduplication; or the tooth 

 -amling "in>id>' may represent an addition to the normal series, 

 and in that <-a<>- the tooth standing as //< :i in the series may be a 

 I* I'p sentation \' m\ raised to the normally higher condition of m- 

 in correlation \\iih th<- presence of an extra tooth in the series, in 

 rln- \\ay -ln-\\n to occur in other cases (see Chapter x., Section 7). 

 ll.-t \\i-i-n tin ' ali-niativc JM i>sibilities I cannot decide. 



Urf/ j >/!_' Ill n/< I r. 



Mycetcs niger : In-tv.i-ui an.l iuti rnal to /^ and i^ on left side there is a 

 .M>l;u . Tin> i- 1'inl.ahiv ;i -ui'i niuini i:iry an', but the jaw is so much diseased 



that tin- n-l.r . n,,t .(istinct. 1J. M., 74'.'. </. 



Callithrix. iiMinial adult-. _"_'. iln II. M., :, 1 , I, on both sides m? is separated 

 narrow dia-t ma iViijii "'-. The appearances sug^st that possibly % small 



rudimentary t.>,,th may IUIM- >tuod lutwci-u thum, but this is quite uncertain). 



Nyctipithecus : 1 1 



Pithecia : 1 1 normal 



>|'i-c-iinriL lia\ iir_ f M. . 



* * V 



aboul to hr formed, for tin- dentition is otherwise complete. C. M.. 

 Cp. No. I'M-.'.) 



'_', ami ai.parriitly this tooth was not 



1094, a. (Cp. X<.. 202.) 



Lagothrix, 6, Chiropotes, 1. Ouakaria, 3 normals respectively. 



II \i'\i. H' r.. In this 1,'nnip /' is normally absent: and no 

 simen lia\im: tlii- t..otli or any other dental abnormality was seen. 



wt-iv seenj 1'i'lon-in^ to various species. 



< 'f .-nlult iKii-nial -kulK 



