Sir Everard Home on corpora lutea. 65 
ovum, by means of the chorion, has a slight attachment to the ' 
inner surface of the corpus luteum. 
Fig. 5, represents the ovum in a detached state; it is smaller 
than that represented in my former paper, which had arrived 
at the cavity of the uterus, in the proportion of to and 
differs from it in being pellucid, the two opaque spots met 
with in the other not yet being formed. 
Fig. 6 . The external form of the ovarium at 47 years 
of age. 
Fig 7. An internal view of the same, showing the re- 
mains of seven corpora lutea. The central cavities are dis- 
tended with coagulated blood, as in all the corpora lutea met 
with after the ova that escaped from them had been impreg- 
nated. The corresponding ovarium contained five corpora 
lutea, similar in appearance to those here represented. 
Plate IV. 
Contains five figures of the human ovarium after impreg- 
nation, the external appearances are of the natural size, the 
internal ones are magnified two diameters. 
Fig. 1. The external appearance of the ovarium repre- 
sented in a former paper on the human ovum, and shown 
again here to complete the series. 
Fig. 2. An internal view of the same, to show the appear- 
ance of the corpus luteum five days after the impregnation of 
the ovum. 
Fig. 3. The external appearance of the ovarium, six 
weeks after the impregnation of the ovum, which was ar- 
rested in the Fallopian tube. 
MDCCCXIX. K 
