34G 



M KIM STIC VARIATION. 



[PART I. 



500. 



507. 



*.-. 



08 



/ v.i ili'iit ni-i.<iiiii I'rmn ,,ii,' ii f thi' phalanges of minimus. 



AXXAXI.AI.K, &.c. ; OTTO, Monstr. .-.re. Desci:, Taf. xxv. fig. 7; CRAMER, 

 /. d. gt . //. ilknwli', 1*:H. No. ">1, p. 809; GAILLARD, Gz. nied., 1862. This form 

 seems to be compaiatm-ly scarci , 



/;// uri-in;! i'r<un uii-tiirnrpus or metatarsus of minimus. 



I b ^init majority of cases are of this nature but exhibit many differences of 

 dirive. Thr articulation m;iv 1-e on the side of the metacarpus V (see MOICAXK 

 M.',,,. Ac. Sci. Paris, 1770, p. 142, fig. 4; Coll. Surg. Mm., Catal. Tmitnl. Ser., 

 Is7'_', No. :!"-<. .-iinl num. rniis other cases), or of the metatarsus V (see Gi:n;i:i;, /. .-.. 

 l<. 17'.. Nt ' '2*\ but in the jic-s tliis is less common. Frequently also the articulation 

 of tin- i-xtru ili/it is on the ln-nd of the metacarpus V (GAILLARD, I.e.) or metatarsus 

 V i.l///,. Coll. Surg., Tcrat. So:, No. 310). 



In tin- for. r<>iiiK cases the extra digit articulates immediately with the side or 

 hcail of nictaraipal or metatarsal, but sometimes in the manus and often in the pes 

 tin- .li^it aitinilatt - at the end of a branch given off by the metacarpus (MOUANI>, 

 iliiil., lii.'. 3, and numerous other records), or by the metatarsus (MoiiAXD, I. c. ; 



STI:;- IB, l-'.ilin. New I'hil. Jour., 1863 (2), p. 89; MECKEL, J. F., Hmi.lh. d. path. 



Aii'it., ii. Ahth. 1, p. 36, and many more. 



Hylobates leuciscus (Fig. 99) having an extra digit in the left manus arti- 

 culating externally with the metacarpus V and in the right manus articulating with 

 a branch from it. Mus. Coll. Surg., Teratol. Ser., No. 307, A. 



I'l ,. '.i'.t. Iliiluliitt,'* l<'in-i.-irit.<. No. ."Os, minimus of right and left manus bearing 

 ;i -upernumerary digit articulating with the metacarpals. 



(From specimen in Coll. Surg. Mus.) 



(b) Complete di'jit //'/////;/ metacarpus or metatarsus external 



to -in i n i in us. 



Kxtra digits u\t' i nal to the minimus are occasionally complete, 



in^:i iii''t:ii"ir|iul i>r niftalai'sal and three phalanges, standing 

 truly in aeries with the other (limits, but to judge from the records 

 this riiinplrtr furiu i^ d'ridcdly i-aiv. In the tii-st of the fbllowing 

 f\;inipli's -ivrii it should be noted that the digit standing fifth, 



