80 The Rete-Cords and Sex-Cords of Chrysemys 
Text Wig. A. 
Text Fries. A-D. Diagrams illus- 
trating various views held by authors 
whose writings are reviewed in this 
article. 
AD.—Fundament of the adrenal 
body. 
GER.—Germinal epithelium. 
M.—Mesentery. 
M, P.—Mal\pighian corpuscle. 
R.—Rete-cord. ; 
S. C.—Sex-cord. 
U. T.—Uriniferous tubule. 
Ww. D.—Wolthian duct. 
sprungsort anzunehmen, der weder in 
den Geweben der Urniere noch in denen 
des Hodens liegt denn ich weder im 
Stande bin einen Zusammenhang mit 
den gewundenen Kanilchen des Hodens 
nachzuweisen, noch einem solchen mit 
dem Epithel Bowmanscher Kapseln 
oder sonst mit Theilen der Urniere. 
Ich nehme daher an, dass sie vom Per- 
itoneum stammen.” No further allu- 
sion need be made to this article. 
Turning to the other groups of the 
Sauropsida, we find a large mass of lit- 
erature. To intelligently discuss this, 
we must use precise terms. ‘The sex- 
cords are those masses or cords of cells 
which eventually become the seminifer- 
ous tubules of the testis or the medul- 
lary cords of the ovary. The rete-cords 
are those structures which eventually 
give rise to the canals which unite the 
seminiferous tubules or medullary cords 
of the sex-glands with the ducts of the 
mesonephros. 
It is not necessary to enter into a 
lengthy review of the literature upon 
this subject. That has been thoroughly 
done by Born, 94, Mihalkovics, 85, 
Janosik, 85, Coert, 98, Winiwarter, 00, 
and others. A few diagrams will suf- 
fice to show, in a sufficiently vivid man- 
ner, the wide differences between the 
many views upon this subject as ex- 
pressed in the papers most worthy of 
note. 
The names associated with the differ- 
ent diagrams, Text Figures A-D, are 
those of the authors who have held 
views represented by the diagrams so 
indicated. After the name of each 
