SUPERF(ETATION AND MOTION OF FCETUS. 195 



the bull the last time, she fell off her milk the day following, and there 

 was a change in the milk. I suspected that some change was going on 

 in the constitution, and therefore kept her. For five months we could 

 not tell whether she was with calf or not ; but she had not taken the 

 bull all this time. Before the sixth month she proved with calf. 



A she animal that has more than one young one at a time, as, e. g., a | 

 goat, &c, can be impregnated by more than one male. I had a she J 

 goat that had, at one time, two young ones to two fathers. The fathers 

 were very different sorts of goats ; one was very large, rough, white, ] 

 and had large horns ; the other was small, smooth, black and grey, and 

 had no horns. The young ones the same [showed respectively the same 

 differences]. 



Case of Superfcetation in a Negro Woman. 



" Dr. H. Allen of Bardadoes, now of Hatton Garden, gave me the 

 following account of a case which happened to a negro woman belonging 

 to the estate of Mr. Happ, a practitioner in medicine in Barbadoes (and 

 Dr. Allen's father-in-law), about the year 1750. A negro woman 

 went the full period, and was delivered of twins, one black and the other 

 a mulatto. She had cohabited with a black man commonly, and had 

 received the embraces of a white man on the estate occasionally. Dr. 

 H. Allen did not see the children, both of whom were dead when he 

 arrived in the island ; neither can he recollect whether they said they 

 were male or female. But he has no reason whatever to doubt the fact, 

 which is besides remembered by his wife. — N. L." 



(Leicester Square, 1784. " Twins born, one black, the other white.") 



John Hunter 1 . 



I saw a male gold-fish in pursuit of a female carp ; therefore very 

 probably they would breed. 



I have seen two flies in copulation some hours ; they will allow them- I 

 selves to be drowned before they will separate. 



Motion ' in Utero ' of Human Fvetus. 



The human foetus has probably more motion in the uterus than that 

 of any other animal : the single circumstance of the greater length of 

 the navel-string woidd give that idea. But in many foetuses, if no.t in 

 all, it would appear that they cannot even turn, the width of the horn 

 of the uterus [in quadrupeds] not admitting of it : this at least is the 

 case with the horns of the uterus of a sow. 



The circulation of a foetus is somewhat similar to that of the Am- 

 phibia, a mixture of the two circulations. There is more blood (in 



1 [Hunter would seem to hare received the above case, at third hand, from N. L .] 



o 2 



