ZooL.— Vol. II.] RISEN— OLIGOCHy^TA. 1 39 



oviducal pore is situated in front of setas cd in XIV. Into 

 this pore opens a very large, somewhat coiled spermathecas, 

 which is bent on itself. The part which is nearest the pore 

 is situated in XIV, but the largest part is found in XIII. 

 Into this spermatheca open three different ducts, within a 

 short distance of each other. The place where these ducts 

 open into the spermatheca is found about one-third the 

 distance from the pore to the inner apex. The ducts which 

 open into the spermatheca are those of the oviducal gland, 

 the anterior oviduct and the posterior oviduct (figs. 49, 50, 

 ov. i; ovd. gl. and ov. 2 and ov. s.). The anterior and 

 posterior oviducts differ in size and function. While the 

 anterior oviduct conducts the undeveloped egg-cells, the 

 posterior oviduct conducts not only the undeveloped egg- 

 cells of the anterior ovary into the ovisac, but also the ripe 

 ova from the ovisac to the spermatheca. The posterior 

 ovaries, which are situated much higher up, are also the 

 largest. As Beddard has pointed out, these ovaries serve 

 also as ovisacs. The ovaries in XIII are rudimentary and 

 furnish only immature ova. The young egg-cells from 

 these ovaries slough off in bunches and are carried through 

 the narrow anterior oviduct (figs. 49, ovd. ov. i) to the 

 base of the spermatheca; thence they are probably carried 

 to the posterior ovisacs, there to go through maturation. In 

 the ovisacs we find ova in all stages of development. There 

 are free bunches of egg-cells, as well as cells attached to 

 the walls of the ovisacs, and it seems there can be no doubt 

 as to the double nature of the ovisac, it being both ovary 

 and an ovisac. The long coiled oviduct is not ciliated, but 

 we find cilia in the funnel of the oviduct, which connects 

 directly with the ovisac. The funnel and the coiled oviduct 

 are entirely in XIII, but the part of the spermatheca into 

 which it opens is in XIV. Beddard states that the oviduct 

 penetrates the septum XIV/XIII twice. This is not the 

 case in the Eiid^'ilus EugenicB from Panama, as has just 

 been shown. The egg-cells in the posterior ovary and 

 ovisac are not placed as in Beddard's figure (PL XX, fig. 

 53), but they are found all along the inner margins of the 

 walls of the ovisac, in the manner figured (fig. 49, ov. 2). 



