258 Dr. Von Siebold on a Douhle-bodied Intestinal TVorm, 



none of these heaps of granules possessed a distinct mem- 

 brane or a clear partition. A bright spot appeared in some 

 heaps, which may probably be the germ*. 2nd, The small 

 narrow pieces of the two vessels which succeed the ovaria 

 may be compared with the fallopian tubes. Both vessels 

 were here so narrow, that never more than one grain at a 

 time could pass through the canal, while at the same time 

 four to five such granules were contained in the calibre of 

 the oviducts. By the extension of the two vessels the heaps 

 of granules take at once the form of oval eggs, and we can 

 suppose these two wide canals lo be, 3rd, The oviducts or 

 uterus. Each egg was enveloped in two delicate colourless 

 tunics. The last egg contained a granular matter, equally 

 divided, which filled out the greatest part of the tunics. I 

 could perceive here no germ ; it had, perhaps, retired to the 

 middle of the yolk. If you examined the eggs in the uterus 

 which are situated more in the upper part, you find that the 

 granules of yolk matter come nearer to one another, and that 

 they at present do not occupy the whole space of the coverings. 

 Still more anteriorly the granular matter in the eggs begins 

 to separate into several round heaps, which hang closely 

 together under one another, and give the form of the yolk a 

 somewhat ragged appearance. In the interior of each of these 

 granular heaps a clear bright spot was to be seen. Such was 

 the state of the eggs to the uppermost end of the two horns of 

 the uterus. After both horns had united into one canal, this had 

 become, 4th, The vagina, and so narrow that no more than one 

 egg at a time could slide through it. This vagina ended after 

 a small bend into the slit towards the outside, and emitted 

 eggs in my presence. 



If we now return to the vessels of the male branch, it might 

 occur to us that the vessel described is the seed vessel, and the 

 two long hard substances the double penis. Truly I am indeed 

 here not able to say in what connection the excretory organs 

 of the testis stands to the female generative organs, whether 

 both possess one opening, or have both different ones, each of 

 which opens externally. 



♦ I have already in this Archiv, (I. 1, p. 79.) made observations on this 

 germ in the Nematoidea : since then I iiave seen it quite distinctly in Spi- 

 roptera contorta, Ascaris vesicularisy lumbricdides, ensicaudata^ aucta, and in 

 Trichocephcdus unguiculatus ; in the last I perceive it even in the ovarium 

 before the yolk was covered with shell. On the contrary, it appears to be 

 more and more confirmed that this bladder is wanting in the eggs of the 

 Acanthocephaluy Trematodny and Cestoidea. Up to the present time t 

 have found no trace of the same in the eggs of the intestinal worms belong- 

 ing to these orders. Wagner also did not perceive it in T(snia and Disto- 

 rnum. (See Miiller's Archiv, II. 4, p. 375.) 



