ZOOGENY. 397 



the animals have a female character, the semen possesses 

 no infusoria, and is in that case simply albumen. 



2302. Semen, which is devoid of infusoria, is incapable 

 of impregnation. How can one wretched female ovum 

 impregnate or fructify another ? 



2303. As the trumpet-like tubes or oviducts belong to 

 the ovaria, so are they developed with the testes, and 

 now convey semen instead of ova. The female tubes 

 become the vasa deferentia or spermatic ducts, the 

 uterine cornua, the vesiculse seminales. 



2304. Between the vesiculse seminales and the vagina 

 or the penis the uterus shrivels up into the prostate 

 gland, into which the vasa deferentia open, like the ovi- 

 ducts do into the uterus. 



2305. As the matrix is the proper female organ, so 

 will the spermatic ducts seek to combine with the penis, 

 or at least open self-substantially upon the os uteri. The 

 testes open either through the spermatic ducts into the 

 vagina, as in Fishes, Reptiles, and Birds, or into the 

 penis, as in the Gasteropods, Insects, and Mammalia. 



2306. Male and female parts are therefore perfectly 

 homologous, the former having a greater development of 

 the external division, the latter of the internal. 



2307. The female parts have undertaken the business 

 of vegetation, or that of the viscera, the male that of the 

 animal excitation. 



2308. Since the male parts are no new formation, but 

 the female parts themselves, only characterized by inter- 

 nal arrest, and external increase of development, so 

 do male and female parts appear incapable of occurring 

 together in any animal. Perfect hermaphrodites would, 

 accordingly be impossible ; for where testes are, no ovaria 

 could be, because the testes are themselves the ovaria, or 

 the latter only changed. 



2809. Hence androgynism would be possible only 

 by one ovarium remaining as such, and the other being 

 converted into a testis. 



2310. This development appears only possible when 

 the two halves of the body are unequal. Asymmetrical 



