lia 
side. On looking into the cavity through the cut, the oviduct will 
probably float up quite separate from the intestines, but it will be 
found to be attached by a delicate, transparent strand or sheet of 
tissue, to the rib which lies immediately below the hinder border 
of the lung. The removal of the intestines will greatly facilitate 
this examination, but it must be done with care. 
In the male there can generally be traced, from the testes back- 
Fig. 4.—A portion of the body-cavity of a Fig. 5.—A portion of the body-cavity of a 
male bird exposed to show the position female bird exposed to show the position 
of the sexual organs :—s.7. suprarenal or of the sexual organs :—s.r. suprarenal ; 
adrenal ; 7g. lung; t. testis; &. kidney ; lg. lung; k. kidney; ovy. ovary; 
vd. vas deferens, or  sperm-duct; ov.d. oviduct ; int. intestine. 
int. intestine. 
wards to the end of the gut, a pair of neatly and closely coiled tubes 
on either side of the body, of a glistening white colour (fig. 4, ed.). 
These, in the absence of distinct testes, will serve to identify the sex 
as certainly as the presence of an oviduct in the female. 
Unless the sexual organs can be recognised without any doubt, it 
is better not to mark the sex on the label. If, however, it has been 
certainly determined, write it down at once. ¢ is the sign for male, 
and @ for female. 
