266 SPECIAL HISTOLOGY. 



of remark. In the papillae of the various situations where 

 they occur, we find for the most part simple vascular loops, it 

 is only when the papillae are larger or compound, such as 

 abound around the orifice of the urethra, that more complex 

 loops occur. The corpora cavernosa have the same structure 

 as in man ; and, according to Valentin, helicine arteries also 

 appear to exist in the clitoris. The venous plexuses in the 

 walls of the vagina, above the bulbi vestibuli, are extremely 

 rich ; but by no means, as Kobelt assumes, represent true 

 corpora cavernosa. The lymphatics of the external genital 

 organs, and of the vagina, are numerous, and communicate 

 partly with the inguinal glands, partly with the pelvic plexus. 

 The nerves, lastly, are derived in part from the sympathetic, 

 in part from the pudendal plexus, and are extremely numerous, 

 especially in the clitoris, but are also found without difficulty 

 in the mucous membrane of the vagina. In the latter situation 

 they present divisions, and their terminations have as yet been 

 but little investigated. I have never found nerves in papillae 

 containing vessels, whilst, in the clitoris, I have sometimes met 

 with them in non-vascular, minute verrucosities, which also 

 contained rudimentary axile corpuscles ; and I think I have 

 noticed here, as well as on the surface of the mucous membrane 

 itself, finer and coarser, looplike terminations of nerves lying 

 buried in the bodies resembling axile corpuscles, which are also 

 occasionally met with in these situations. In the clitoris of 

 the Sow, Dr. Nylander, of Helsingfors, found Pacinian bodies, 

 which I have also seen ; and looped terminations of the nerves 

 in the papillae. 



§ 209. 



Physiological remarks. — In their development the internal 

 female genital organs, as was noticed above in § 202, entirely 

 correspond, originally, with those of the male ; and it is not 

 till after some time that a difference in the histological deve- 

 lopment of the sexual glands is manifested, consisting in this, 

 that in the female, the Wolffian body, except that it forms the 

 parovarium, stands in no farther relation to the genital appa- 

 ratus, whilst the " ducts of Miiller" are formed into the oviducts, 

 uterus, and vagina. As regards the histological conditions, the 

 ovaries alone seem to present any great interest. These bodies 



