118 KIOHARD ASSHBTON. 



I could detect no difference except as regards size. 



No. 4. I could make nothing of this one ; it may have been 

 an unfertilised ovum or pathological. 



No. 5 was in two segments. Here again the only diflFerence 

 I could detect was in size, as follows : 



Larger segment .... '086 mm. x "072 mm. 

 Smaller segment . . . "OSi „ x "066 „ 



No. Q, the lowest down, that is to say the nearest the uterus 

 on the left side, was still unsegmeuted, being spherical. Both 

 polar bodies were visible between the ovum and the zona pellu- 

 cida. 



The ova from another rabbit, No. 51, were examined fresh in 

 aqueous humour of the rabbit. 



In the left Fallopian tube I found only one ovum, situated 

 almost midway between the two ends. This specimen was not 

 yet segmented, but the ovum had retracted from the zona 

 pellucida, which seems to be a sign that it was a fertilised ovum. 



In the right oviduct I found four ova. 



No. 1, the one nearest the funnel opening of the Fallopian 

 tube, was in two segments. I could determine no difl'erence in 

 character, but on measurement a slight difference in size was 

 made evident. 



Larger segment . . . '0924! mm. x "070 mm. 

 Smaller segment . . . -0920 „ x -064 „ 



After being carefully examined and measured while fresh, 

 this specimen was transferred to a 2 per cent, solution of 

 osmic acid for thirty seconds, and subsequently stained with a 

 mixture of aniline blue-black and picro- carmine, and mounted 

 in glycerine jelly — a very pretty preparation. At no period could 

 I detect any difference except in size between the two segments. 



In this specimen the two polar bodies were placed far apart 

 from each other, a peculiarity I have not noticed in any other 

 (v. fig. 4). 



No. 2 was also in two segments, and was examined, measured. 



