EARLY STAGES OP DEVELOPMENT OP THE RABBIT. 117 



In giving the measurements I have reduced these to actual 

 measurements, giving them in decimal fractions of one milli- 

 metre. 



No. 4 was also in two segments, but was not measured ; each 

 segment was composed of an inner denser and outer clearer 

 part. In the Fallopian tube of the left side I found six ova, 

 which were scattered along an area between two points 

 35 mm. and 65 mm. from the upper end of the Fallopian 

 tube. The whole length of the Fallopian tube was about 

 100 mm. 



Three of the ova were in the wide thin-walled upper part, 

 and the other three were just within the lower thicker-walled 

 portion of the Fallopian tube. No. 1, that is to say the one 

 nearest to the funnel end, was unsegmented. It appeared, how- 

 ever, to be on the point of dividing (fig. 1). It did not occupy 

 the whole of the cavity Avithin the zona radiata. It was 

 spherical, and two polar bodies lay between the ovum and the 

 zona, the one larger than the other. The nucleus, however, 

 though not very distinct, undoubtedly seemed to be double or 

 dumb-bell shaped. 



The diameter of the ovum was '11 mm. 

 No. 2 (v. fig. 3) was in two siegments. The difference in 

 size between these two was very marked. It was quite obvious 

 without measurement. This specimen showed the greatest 

 difference I have hitherto met with. There was no perceptible 

 difference in density or in colour, either while fresh or after 

 treatment with nitrate of silver followed by picro-carmine and 

 aniline blue-black. Tiie measurements of the two segments of 

 this specimen were as follows : 



Of the larger the longest diameter was 'lOl mm., the 

 shortest diameter '088 mm. Of the smaller the longest dia- 

 meter was 'OS mm., and shortest was "061 mm. The nuclei 

 were clear and round. 



No. 3 was in two segments, but far more equal in size. 

 Nuclei round and clear and distinct. Measurements were — 



The larger segment . . . "l mm. X .'078 mm. 

 The smaller segment . . . -098 ,, X '074 ,, 



