van Wagenen and Hamilton 587 



The bulbourethral glands were grossly twice the size of the homologous 

 glands of the normal female fetus (compare pi, 2, fig. 10, and pi. 3, fig. 12). The 

 epithelium lining the ducts was irregular and lumens were formed through- 

 out. The excretory ducts of these glands coursed dorsal to the penile urethra 

 and accompanied it for some distance into the spongy portion before opening 

 into the dorsal wall. 



Plate 2, figure 7, presents the structure of the testis and epididymis. 



Fetus 60, Untreated Female Control. The gross appearance of the external 

 genitalia of the animal is shown in plate 1, figure 3. The clitoris was a small 

 non-protuberant mass, without a distinct glans, that overlay the anterior end 

 of the vestibular orifice. The vestibule opened to the exterior between the 

 anterior portions of the ischial callosities. The region over the symphysis pubis 

 corresponding to the scrotum presented no swellings. 



The gonad was recognizable as an ovary with stroma and sex cords. Its 

 character and that of the Fallopian tube and ampulla are shown in plate 3, 

 figure II. There was a cavum uteri which in longitudinal section could be 

 seen to dip into the uterine wall as irregular crypts, some of which were sub- 

 divided (pi. 3, fig. 13). The epithelial lining of the uterus was composed of 

 pseudostratified columnar cells, with their nuclei bordering upon the lumen, 

 and the deeper parts of the cells appeared as a clear zone beneath the layer 

 of crowded nuclei. The cells lining the crypts were cuboidal. The stroma, well 

 developed and without edema, was composed of compact muscular tissue. 



The vagina lay dorsal to the urethra (pi. 3, fig. 12) to which in the distal 

 portion it was bound by an outer common fibromuscular coat. At a site 

 proximal to that in plate 3, figure 13, the cross section of the conjoint struc- 

 tures was egg-shaped, with the vagina in the broad portion and the urethra 

 in the narrow. The vagina was a solid cord of cells for the greater part of its 

 length, but patent at the uterine end and also as it entered the vestibule. The 

 vagina, whether a solid or an open structure, was compressed dorsoventrally 

 throughout the greater part of its length, but just before opening to the sur- 

 face, the vestibular part was compressed laterally (compare pi. 5, fig. 22, of 

 animal 63 with pi. 3, fig. 14). Plate 3, figure 12, shows the urethra entering the 

 vestibule on the summit of a papilla, while on the opposite wall of the vesti- 

 bule there open ducts from the laterally located vulvovaginal glands. Essen- 

 tially, then, the conformation of the vagina, urethra, and vestibule was that 

 found postnatally in the normal female monkey. 



The clitoris was composed of two corpora cavernosa which in the peripheral 

 part of this organ fused to form a single body. Nothing comparable to the 

 corpus cavernosum urethrae was seen, but the tissue immediately surrounding 

 the sagittal spike of cells attaching the frenulum to the glans was as loosely 

 packed as that in the prepuce. Cavernous tissue was prominent only in the 

 glans (pi. 3, fig. 15), although large veins were found within more proximal 

 portions of the cavernous bodies. The clitoris had a core of non-ossified. 



