THE SEXUAL ORGANS. 239 



bulbosa, bulbo-urethrales, and dorsales, and in the bulb there 

 also exist art. helicinae. The veins commence, as it may be 

 said, in the venous spaces which intercommunicate throughout; 

 and from which, though not universally from the same situations, 

 short efferent canals, or emissaria, receive the blood and convey 

 it into the external veins furnished with special walls (vena 

 dor sails , v. v. profunda, and bulbosce in particular). The 

 lymphatics form very close and delicate plexuses in the skin 

 of the glans, the prepuce, and in the remainder of the integu- 

 ment, and communicate with the superficial inguinal glands 

 through trunks accompanying the dorsal vessels. According 

 to Mascagni, Fohmann, and Panizza, there are also numerous 

 lymphatics in the glans surrounding the urethra, which run 

 backwards on that canal, and proceed to the pelvic glands. 



The nerves of the penis are derived from the pudendal and 

 the plexus cavernosus of the sympathetic, the former of which 

 are distributed principally to the skin and the mucous mem- 

 brane of the urethra, and, in a small proportion only, to the 

 corpora cavernosa, to which alone the latter set of nerves is 

 destined. The terminations of the former nerves present the 

 same conditions as those of the integuments ; numerous divi- 

 sions, in particular, and faint indications of axile corpuscles, 

 occur in the glans penis ; those of the latter nerves are not as 

 yet known, although, in the trabecule of the corpora cavernosa, 

 nerves with fine fibres, and " fibres of Remak," are readily 

 demonstrated. 



[The smooth muscles of the corpora cavernosa are very dis- 

 tinctly shown in the penis of the Horse and Elephant, but are 

 also not wanting in those of other Mammalia. The art. helicince, 

 since Valentin and Henle have declared them to be produced 

 artificially, and to arise from the inrolling of trabecule which 

 have been cut across, or from the spontaneous retraction of 

 certain arteries in stretched trabecule, have been generally 

 rejected, but incorrectly. They do exist ; only I am satisfied 

 that the circumstance, noticed even by J. Muller, of the ex- 

 tremity of one of these arteries, giving off an excessively delicate, 

 almost capillary vessel, occurs very frequently, and consequently, 

 that the csecal terminations are merely apparently such. That 

 similar terminations do not exist at all, cannot, however, be 



