The Journal of experimental zoology . estis with the peripheral portion of the large organ is distinctly ovar-ian. It consists of thickened stroma packed with interstitialcells like the old Campine (fig. I). It contains oocytes of allsizes, small ones with only a granulosa layer to the follicle andlarge ones with nests of lutear cells in the theca interna. There 24 ALICE M. BORING AND RAYMOND PEARL are not nearly as many oocytes as in a normal ovary. Finallyit contains a few discharged follicles; one recently dischargedwith the cavity still large and the granulosa sloughing off intoi
The Journal of experimental zoology . estis with the peripheral portion of the large organ is distinctly ovar-ian. It consists of thickened stroma packed with interstitialcells like the old Campine (fig. I). It contains oocytes of allsizes, small ones with only a granulosa layer to the follicle andlarge ones with nests of lutear cells in the theca interna. There 24 ALICE M. BORING AND RAYMOND PEARL are not nearly as many oocytes as in a normal ovary. Finallyit contains a few discharged follicles; one recently dischargedwith the cavity still large and the granulosa sloughing off intoit, a second with the cavity just obliterated by the shrinking ofthe walls, and a number with the degenerating lutear cells inthe center containing the yellow pigment, exactly as in normalbirds. This is normal ovarian tissue, but there is not so muchof it as there is of the testicular tissue. The composition of thisorgan is more like Atwoods bird than any other, in the propor-tion of male and female parts. The point in which this bird. 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 thetestis show signs of very recent or present activity. It is interesting to compare the structures found in thesebirds with those of some of the hermaphrodite birds previouslydescribed by other authors. In 1889, Brandt described eighthermaphrodites of varying structure, seven of which he con-siders modified females. In 1906, Shattock and Seligmanndescribed a twO year old Leghorn with an ovotestis. Also ofinterest are the hermaphrodites with ovary and testis describedby Pearl and Curtis, the four mule pheasants, which are sterilefemales with some male secondary sex characters, described by SEX STUDIES. XI 25 Smith and Thomas, and a gynondromorph pheasant describedby Bond in 1914. The oviduct is an almost constant feature inthese birds. The only bird without an oviduct is one describedin Brandts p
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Keywords: ., bookauthorwi, bookcentury1900, bookdecade1910, booksubjectzoology
