122 RIOHAED ASSHETON. 



slightly unequal spheres. The smaller of these two divided 

 into twOj each of which has divided into two, the result being 

 four approximately equal spheres {S^., S^., S^., S^.). The larger 

 primary spheres divided into two, one of which is still undivided 

 {L^.), the other having divided into two (marked L^.). Here 

 again there seems to be a tendency for the descendant spheres 

 of the smaller primary to undergo division first. 



In the Fallopian tube of the left side of the same rabbit I 

 found six embryos, of which some were in seven segments, 

 others in eight. I had not time, unfortunately, to measure all 

 these or draw them carefully. The embryos of this rabbit 

 seem to be unusually far advanced for their age. 



The stage with eight segments is a very common one to find 

 between the 29th and 44th hours. This may be accounted for 

 by there being a rather long resting stage after the production 

 of the eight segments. 



One rabbit f Rabbit No. 19) presented a very curious condition 

 of its Fallopian tube, a condition, I believe, that has been 

 noticed before, but I cannot remember by whom. The rabbit 

 was a very large, healthy English doe. Both Fallopian tubes 

 were almost filled with ova. On examining the Fallopian tubes 

 with a lens before opening I imagined I had come across a 

 marvellous find of embryos — in all about fourteen " ova " were 

 to be seen shining through the wall of the left Fallopian tube. 

 Of these only three turned out to be embryos, and were 

 mingled with at least twelve apparently disintegrating un- 

 fertilised ova. The right Fallopian tube likewise contained a 

 number of disintegrating ova, as well as four perfectly normal 

 embryos. 



Some of these unfertile ova were more thickly coated with 

 albumen than is usual for normal eggs, possibly due to their 

 having been a long time in the Fallopian tube. It is a matter 

 of curiosity why these unfertilised or pathological ova had not 

 passed down the Fallopian tube, but had allowed the fertile 

 ova to pass them, as one at least had succeeded in passing the 

 whole twelve bad ova. One can hardly believe that all these 

 ova had left the ovary at the same time and together with 



