Bennet M. Allen . 81 
author are placed the names of the forms which he studied in arriving 
at his conclusions. 
A. Tubules arise from the Wolffian duct and grow into the sex-gland 
fundament. Their distal portions form the sex-cords while their prox- 
imal portions form the rete-tubules. 
70, Waldeyer—Chick (Gallus). 
B. According to this view, evaginations grow out from the capsule 
of Bowman. Distal branches from these stems pass down into the sex- 
gland fundament to form sex-cords, while the more proximal portions of 
the evaginations remain attached to the capsules of Bowman and serve 
as rete-tubules. 
Braun, 77, Platydactylus, Tropidonotus. 
Weldon, 85, Lacerta. 
Hoffmann, 89 and g2, Lacerta, Hematopsis, Sterna, Gallinula. 
Semon, 87, Gallus. 
Peter, 04, Lacerta. 
Braun, 77, considers the rete-sex-cords to be, in the strictest sense, 
segmental in arrangement. He expressly denies that the cells that con- 
tribute to the formation of the adrenal body are derived from branches 
of the evaginations from the capsules of Bowman, as asserted by Weldon, 
85 and Hoffmann, 89 and 92. These two last named authors asserted 
that each evagination divides into a dorsal and a ventral branch, the 
_ former supplying the cells of the cortical portion of the adrenal body, 
and the latter forming the sex-cords. Semon, 87, was not so clear upon 
the question. He merely stated that the anastomosing cords arising from 
the capsule of Bowman pass into the adrenal and sex-gland fundaments, 
—the more dorsal to the former, the more ventral to the latter. 
C. Large numbers of cells migrate from the germinal epithelium into 
the underlying stroma. From this unorganized blastema, the sex-cords 
are formed, suddenly crystallized as it were. The rete-cords are formed 
of evaginations from the capsule of Bowman. 
Schmiegelow, 82, Gallus. 
Mihalkovies, 85, Lacerta, Gallus. 
Laulanie, 86, Gallus. 
D. According to Janosik, the sex-cords arise as direct ingrowths from 
the germinal epithelium. Cords of cells grow from their distal ends to 
the capsules of Bowman, thus forming the rete-cords. Cords of cells 
grow in from the peritoneum between the sex-gland fundament and the 
mesentery to form the cortical portion of the adrenal body. 
Janosik, go, Gallus. 
6 
