the Origin of Intestinal Worms, 339 



secretion of the egg-shells. The real ovary is a large gland 

 composed of ducts, in which the small yolks are disposed in 

 rows ; and it lies at each side of the uterus, near its posterior 

 extremity. Besides these glands, a great number of yellow 

 glands, 1200 in each joint, are found close beneath the skin 

 of the lateral parts, in the joints furthest from the head, or 

 in the last stage of the formation of the eggs, these glands 

 become filled with a thick yellow matter, which they pour 

 into a system of beautifully ramified ducts, which again dis- 

 charge themselves on a certain spot of the uterus. It would 

 be out of place to repeat in this place the whole series of ob- 

 servations which led to the conclusion that these 1200 glands 

 in each of the thousand joints have no other destination than 

 to form a crust round the ova, by means of which they are 

 evacuated, not singly one by one, but in hard cylindrical 

 masses after the uterus and joint have been ruptured. By this 

 observation, the curious fact that an animal with millions of 

 eggs is generally found solitary, seems to be explained in a 

 satisfactory manner. 



Proceeding to the male organs of generation, I will first 

 mention a number of glands — about 400 in number — ^lying in 

 the most deep-seated layer of the joints, each gland in a sepa- 

 rate cellule. These glands I have reason to regard as so many 

 testicles. The vasa deferentia mount up in a serpentine course 

 to a vesicle which is analogous to the bursa lemnisci in the 

 Trcmatoda, and which can very easily be seen in any joint of 

 the Bothriocephalus latus. In this bursa lies the penis, more 

 or less protruded through the great aperture. The small 

 aperture, supposed to be the vulva, is easily distinguished in 

 each joint. Between this and the great aperture a great num- 

 ber of glands discharging themselves outwardly are observed. 

 This immense complication of the reproductive apparatus 

 apparently leaves no place for the other organs, but a more 

 minute investigation will demonstrate several strata of mus- 

 cles, an alimentary tube which, in the form of a very nar- 

 row bifurcated cord, extends the whole length of the ani- 

 mal, and other systems. The disproportion of the generative 

 system is so much the greater as the joints are more deve- 

 loped. The manner in which this disproportion is produced. 



