Tin: ORfl Un 01 mi' MIM.U: .I:I:M \..\\ i 



toidin cry-tal.-, which now .irivi- to tin- bod\ an orange i-d color. The 

 connective ti--ue, originally uith an abundance of n 11>, be^'in.- to 

 shrivel, as in tin- formation of ;| >( -ai ; a- a n >ult of these various 

 pivcees of deio neiation tin- yellow body, which proj.ets beyond tli- 

 Mirface of tin- ovary, he-in- to become coti-id>-ra 1 >1 v -mailer, and is 

 finally roiivi rted into a firm connect iv-t i ue callus, which causes 

 a di-a \\inir in :it tin- surface of tin- or^an. 



When fertilisation has not occuned, the am> int-tamorpl 

 and {irocTSSes of Drouth it is true ta kc place, hut tin- tal-e coi-[>u> 

 luteum n-m.-iiiiN very much smaller. Tin'- i- j>i-oljil)ly due to 

 the fai-t that theafllux of hlood to the sexual organs is very much 

 le when there is no fertilisation than in case preirnanoy take- 

 place. 



In adilition to the tubes of PFLUGEU, which arise from the 

 L'eiiiiinal epithelium and produce the primitive ova, in mo>t c! 

 of Vert citrates tpithtlfal cords of another kind an<' nuntln r <,ri>iin 

 inin tin' composition of the ovary. As has been observed by 

 \arious persons in Amphihia. l!eptile>, l>iids and Mammal.-, there 

 irrow out from the Wolfiian hody, whirh lies in the immediate 

 vicinity, epithelial shcot.-. the lt sexual OOrds /'//<>' jifiiitifiri' ki<l 

 and the-o penetrate toward the developini: ovary even a> < arly as 

 the h. irinniiu: of tin- interi:rowth between germinal epithelium and 

 connecti\- tiue. They arise from the epithelium of the Malpighun 

 corpuscles, as BRAUN has shown for Reptile-, lloi-i MANN for Ampliihia. 

 and SEMON for Birds. In Mammals, in which at present their sub- 

 si ijiunt t'ati' l:as been most acc-urately traced out. they then unite 

 with one anothtr into a network at the ha.-e of the fundament of 

 the ovary, which protrudes as a ridp- into the hody-cavitv, and. 

 pm.-uini: tortuous courses, grow into contact with the tube 

 I'FI.M.KH. \Vb. n a- in .Mamn:als the cort< x of the ovary is de- 

 veloped out of the latter, the former -hare in the composition of 

 the future medullary -ul>-tance, and are on that account designated 

 as ///"////A//-// cords. In the vicinity of the follicle tiny remain solid, 

 when a- the pait mar the primitive kidney acijuir: s a cavity which 

 is surrounded by cylindrical ceil-. 



The medullary cords . \hibit in difl'ereut species of Mammal.- 

 ditl'erent degrees of development, as the comparative inv. Mirations of 

 H.vitx have established. In some animals. *-.;/., in the 1'i^r and Sheep, 

 they n-ach only to the base of the ovary, and therefore remain -epa- 

 ratid from the tubes of PFLUGER by a wide apace; in other- tlu-v 

 inow out into the vicinity of the latter, and in part apply themselves 



