DUPLICITY. 31 



for a short distance at least from the umbilicus. The 

 parasite appears to have no spinal column ; but the pos- 

 terior limbs are well developed, and the anterior limbs 

 are small but clearly recognizable. 



Presented by E. Self our, Esq. 



126. A similar specimen, in which the anterior extremities of the 



parasite are fused with the left anterior extremity of the 

 autosite. 



127. A similar specimen, except that the anterior extremities of 



the parasite are wanting. 



128. A specimen similar to No. 125, with the body-cavities laid 



open to show that they are quite distinct. That of the 

 parasite contains a single large kidney and a urinary blad- 

 der : it has no alimentary canal. Hunterian. 



129. The skeleton of a similar Kitten and parasite. The ster- 



num of the autosite is divided by a wide oval fissure, 

 in which the four limbs of the parasite are seen. The pa- 

 rasite has no vestige of an axis, unless a band of ligament 

 in the centre of the sternal fissure represent its remains. 

 The anterior pair of parasitic limbs are fused as far as the 

 carpus. The Kitten was one of a litter of three, the 

 others were normal. 



130. A clay model of the Chinese lad Ake, aged 16, with an 



acephalous parasite attached to the lower part of the ster- 

 num. The model was made from memory by a Chinese 

 artist. The following extracts from a letter from J. Li- 

 vingstone, Esq., Surgeon to the British factory at Hong 

 Kong in 1804, give the history of the case : 

 " Ake was born with another male child of nearly the same size 

 united to the pit of his stomach by the neck, as if his brother had 

 plunged its head into his breast. The mother died from the effects 

 of the labour. 



" Since birth the parasite has not increased much in size. 

 The shoulder-bones are remarkably prominent. Here the model 

 is faulty, since it presents the roundness of infancy ; but all the 

 plumpness had disappeared from the original, and the bones 

 seem only covered with skin. The manner in which the thighs 

 appear is quite happy; but the feet, particularly the left, are not 

 sufficiently clubbed. In the original the feet and toes are less 

 perfect than in the model ; the toes adhere, and one or two are 

 wanting. 



