Bennet M. Allen — SY 
cords remain stationary and almost, if not quite, in contact with the 
wall of the V. renalis revehens, while their bases grow peripherally with 
the germinal epithelium. Mesenchyme cells between the sex-cords are 
few and far between. 
At some points, the tips of the sex-cords penetrate to one side or the 
other of the V. renalis revehens, and penetrate to the adrenal fundament 
to which they contribute. 
Plate I, Fig. 3 shows a wax plate reconstruction of a large part of ae 
sex-gland of the 7 mm. C-7. stage. In this stage the carapace has just 
formed. The prominent funnel-cords afford the most striking feature of 
the model. Their bases are attached to the peritoneum at the lateral 
boundary of the sex-gland. They extend in a dorso-medial direction. 
It will be noticed that each is connected with a primary Malpighian 
corpuscle. The other Malpighian corpuscles are not shown in the model. 
Mediad of the funnel-cords the peritoneum is greatly thickened, form- 
ing numerous irregular elevations and ridges between which are deep 
clefts and pits. These thickenings are the sex-cords. They are solid 
and their cells show no evidence of a radial arrangement to form a 
lumen. The peritoneum is far more cut up than would appear from the 
model. Many slight fissures separating adjacent sex-cords do not appear. 
In any case many of these rudimentary sex-cords are from the first, 
united with the funnel-cords while others anastomose freely with one 
another, so that all are either directly or indirectly connected with the 
latter. 
Primitive sex-cells are frequently met with in the germinal epithelium, 
as well as in the distal parts of the funnel-cords. Aside from the 
scattered primitive sex-cells, these tissues are composed of ordinary perit- 
oneal cells. The cells of the germinal epithelium are so crowded as 
to make it stain very deeply. The sex-cords are less dense, their cells 
being distinct and having clear, sharp outlines, thus differing from 
those of the sex-cords of the pig and rabbit, in which a syncytium is 
formed among the pure peritoneal cells. The cells of all but the most 
proximal parts of the funnel-cord are elongated in the direction in which 
the cords extend. This elongation of the cells is so marked that they 
resemble the surrounding mesenchyme save for the fact that their cyto- 
plasm is more dense thaw that of the latter. The cells are so closely 
associated that these funnel-cords stand out quite clearly from the sur- 
rounding mesenchyme. 
The proximal part of each funnel-cord is met by one, or sometimes two, 
evaginations from the capsule of Bowman of the adjoining primary 
Malpighian corpuscle. These evaginations are very clearly distinguish- 
