24 ALICE M. BORING AND RAYMOND PEARL 
are not nearly as many oocytes as in a normal ovary. Finally 
it contains a few discharged follicles; one recently discharged 
with the cavity still large and the granulosa sloughing off into 
it, a second with the cavity just obliterated by the shrinking of 
the walls, and a number with the degenerating lutear cells in 
the center containing the yellow pigment, exactly as in normal 
birds. This is normal ovarian tissue, but there is not so much 
of it as there is of the testicular tissue. The composition of this 
organ is more like Atwood’s bird than any other, in the propor- 
tion of male and female parts. The point in which this bird 
7 
Fig. I Portion of periphery of gonad from 1616, showing numerous inter- 
stitial cells (X 264). 
differs from all others studied is that both the ovary and the 
testis show signs of very recent or present activity. 
It is interesting to compare the structures found in these 
birds with those of some of the hermaphrodite birds previously 
described by other authors. In 1889, Brandt described eight 
hermaphrodites of varying structure, seven of which he con- 
siders modified females. In 1906, Shattock and Seligmann 
described a two year old Leghorn with an ovotestis. Also of 
interest are the hermaphrodites with ovary and testis described 
by Pearl and Curtis, the four mule pheasants, which are sterile 
females with some male secondary sex characters, described by 
