VARIATION, EXCESS OF GROWTH. 75 



a very rudimentary accessory fifth finger, attached by 

 ligament only to the metacarpal bone. It has neither 

 tendons nor muscles. 



Presented by R. Partridge, Esq., 1864. 



310. The right foot of the same Infant, with a supernumerary 



outer toe. The specimen is dissected. The fifth and 

 supernumerary toes are equal in size ; both are articulated 

 with a very broad metatarsal bone. The fourth tendon 

 of the flexor longus digitorum splits into two equal parts ; 

 one portion is inserted into the accessory toe. The ad- 

 ditional toe also receives a distinct slip from the tendon 

 of the peronseus tertius. The other foot was normal. 



Presented by R. Partridge, Esq., 1864. 



311. The bones of a Human thumb with dichotomy of the ter- 



minal phalanges. The accessory and normal bones are 

 symmetrically developed, apparently right and left. 



Presented by Dr. Thurnam, 1872. 



312. The skeleton of the left foot of an adult Human female, 



with a supernumerary fourth toe, resembling that of the 

 right foot, between the outer and fourth digits. The ad- 

 ditional toe has a distinct but imperfect metatarsal bone, 

 which is attached to the outer side of the fourth, and 

 wedged between it and the fifth metatarsal bone. There 

 is a cup-shaped cavity at the base of the fifth metatarsal 

 bone, which lodges the base of the accessory bone. 



Presented by Erasmus Wilson, Esq., 1869. 



313. A portion of a Human foot which had six toes. The great 



toe has been removed. The three outer toes are enclosed 

 in a common integument to their extremities. 



Hunterian. 



Class II. DUPLICITY. 

 Arranged in Class I. (see page 71). 



Class III. EXCESS OF GEOWTH (HYPERTROPHY). 



314. Wax models of two Human hands and a foot, with the 



index and middle fingers of the hands and the corre- 

 sponding toes excessively hypertrophied. 



