SI 8 Mr Livingstone’s Observations on a Chinese Lusus Naturae. 
Utriusqiie fratris genitalia perfecta sunt, atque ilia parasiti, 
nisi quod est phymosis naturalis glandem tegens, et scrotum ita 
contractum ut testes non manifesto patere sinat, penitus evolvi 
videantur. Singulis subinde tentigines adsunt, sed neutro illo- 
rum adhuc aliquid seminis emissum est. 
Parasitus haudquaquam constanter urinam suam eodem quo 
A-gan tempore reddit. Nonnunquam humor aliquanto turbidus 
stillat, quantitas cujus usu liquidorum copiosiore augetur. 
A weak pulsation could be felt on the neck, arm, wrists, &c. of 
the parasite, by comparing which with the pulse of A-gan, no 
doubt can be entertained but one heart serves both. 
A-gan states, that when very young, an attempt was made 
to remove the parasite by ligature, and that it was continued 
for five years, when his life appearing in great danger, it was 
then abandoned. It seems probable, that this treatment of the 
parasite may at least have modified his present condition ; be- 
sides the necessary support when at work, had kept the legs of 
the parasite so long, and so closely bound up on the thighs, that 
an adhesion has been formed from the ham to the middle of 
the leg and thigh respectively. No anchylosis seems to have ta- 
ken place. 
He says, that at an early period, no adhesion existed, and. then 
the parasite could move both arms and legs. In a subsequent 
conversation, he said he doubted this ; but most strenuously 
maintained, that he feels every hurt inflicted on the body of his 
brother, even the bite of a musqueto: he complained of the 
pain, which he said was inflicted by pressing on his empty 
chest, trunk or pelvis. When I pinched unobserved his hip, he 
appeared unconscious that I had done so. 
My friend Dr Morrison procured for me ample opportuni- 
ties of observing this interesting Lusus Naturae^ and kindly gave 
me his best assistance in separating the truth, such as it has been 
stated, from much fable, which doubtless had been contrived to 
amuse spectators. The result differs in some respects from my 
printed account,— the principal facts remain, but it was ob- 
viously my duty to state the discrepancies that have appeared, 
John Livingstone. 
