200 Mr. Cruikshank's Experiments 
generation, exactly in the same state as the external ; that is, 
as black as ink : the ovaria had, immediately under their ex- 
ternal surfaces, a great number of black, round, bloody spots, 
somewhat less than mustard seeds. These black spots are the 
calyces or cups which secrete the ova ; they are extremely 
vascular ; the ova themselves are transparent, and carry no 
visible blood vessels. These calyces, on the expulsion of the 
ova, enlarge and become yellow, projecting above the external 
surface of the ovai fa, and form the corpora lutea ; a certain 
mark of conception in all quadrupeds, and in women them- 
selves, whether the embryo is visible or not. The use of the 
corpora lutea is not yet made out ; but the orifice, through 
which the ovum bursts into the fallopian tube is often ex- 
tremely manifest, and always has a ragged border, as lacerated 
parts usually have. The fallopian tubes, independent of their 
black colour, were twisted like wreathing worms, the peri- 
staltic motion still remaining very vivid ; the fimbrise were 
also black, and embraced the ovaria (like fingers laying hold 
of an object) so closely, and so firmly, as to require some force, 
and even slight laceration, to disengage them. 
EXPERIMENT II. 
I opened a female rabbit two hours after she received the 
male : the black bloody spots (just mentioned) now projected 
much above the surfaces of the ovaria, some of the ruptured 
orifices were just visible; but in many of these spots there was 
not the least vestige of an orifice ; whence I conclude that 
they heal very quickly in general. While the animal was yet 
warm, I injected the arterial system with size coloured with 
vermilion, whence every thing I had before seen became now 
