MALE ORGANS OF GENERATION. 205 



sperm ducts *. In Trichodes, the epidydimis is also a simple, very 

 much convoluted vessel, without distension or appendages f. 



In Locitsta and Gryllotalpa, the epidydimis forms a convolution of 

 vessels. In Gryflolalpa, each of the four thick testicular bodies 

 appears to consist of one convoluted vessel. The superior one or 

 epidydimis is smaller, conical, and provided at the end with a long free 

 filament; the lower true testis is larger and kidney-shaped. Both 

 display upon their surface evident windings of vessels, which are 

 surrounded by a darker mass. Their ducts unite beneath the large 

 testis into a small sperm bladder, into which also the thick convoluted 

 gluten vessel empties itself J. In Locusla, each epidydimis consists of 

 two divisions : the upper one (a.) is a fasciculus of long, snow-white 

 convoluted vessels, which all unite by degrees into a tolerably large duct ; 

 the lower one (6.), on the contrary, is an oval bag, the superior surface 

 of which sends off short round, tolerably narrow, filamentary processes. 

 The sperm duct empties itself into the neck of the bag, but the duct 

 of both bags, as well as the short one of the upper fasciculated 

 epidydimis, form likewise two short tubes, which speedily unite with 

 the broad, almost bag-shaped ductus ejaculatorius. At this point of 

 union, we find on each side a small round little bladder, which is the 

 vesica seminalis. 



These are the different forms of the hitherto observed epidydimes : 

 other vascular appendages of the male sexual organs we shall shortly 

 investigate, and discern in them gluten organs. 



149. 



THE VASA DEFERENTIA AND VESICA SEMINALIS. 



The ducts which connect the testes with the common ductus 

 ejaculatorius, are called vasa deferentia, or sperm ducts. They are fine 

 tubes, originally of very small circumference, which either retain a 

 uniform size, or distend in front of their orifice, and widen into an oval, 

 long bladder. This distension is called the vesica seminalis or sperm 

 bladder. 



We can speak only of the number and length of the sperm ducts. 

 With respect to their number, we observe where several testicular bodies 

 are found. There are also at first several sperm ducts, all of which, either 



* See Brandt and Ratzeburg Arzeneithiere, vol. ii. PI. XIX. f. 12 and 13. e. e. 

 f Suckow, as above, PI. X. f. 57. Ibid. PI. XII. f. 20. 



