MONFLIGASTER HOUTENII. 99 



one of the above-mentioned pores between the S^^ and 9*^ 

 ring. I believe bundles of spermatozoa could be recogni- 

 zed within them and therefore these two pouches may 

 be regarded as the spermathecae. In the 11th j-ing He two 

 long, narrow, tubular glands, opening on to the exterior 

 by the fissures between the 11th and 12th segment; not 

 only by their shape but also by their colour these bodies 

 are quite agreeing with the prostate-glands of Acantho- 

 drilus a. o., so that they undoubtedly correspond with 

 them. I have not been able however to find out the vasa 

 deferentia. 



At the posterior side of the IQth septum there are at- 

 tached two large, flat, pale brown organs, which I sup- 

 pose may represent the seminal reservoirs (testes), although 

 a microscopical examiuatiou did not reveal any trace of 

 spermatozoa in them , but only the presence of innume- 

 rable gregarine-capsules. In the 14th segment the anterior 

 septum bears a broad, brown vesicle !3 m.m. long and 

 extending into the two following segments; this pouch 

 has a glandular wall and is coated at the internal side 

 with a dense net-work of blood-vessels. As stated before 

 the 12th and 13th septum are placed close against each 

 other ; these two septa seem to form together on each side 

 a sort of funnel , the inferior part of which commu- 

 nicates with one of the pores on the 14th ring. Although 

 the ovaries could not be found, I suppose that this funnel 

 may functionate as an oviduct and that the vesicle repre- 

 sents a receptaculum ovorum , as we find fixed to the ovi- 

 duct of Lumhricus , Criodrilus a. o. 



The nephridia (^fig. 2) are very obvious , attached to the an- 

 terior septum of each segment ; their external apertures lie 

 in a line with the dorsal pairs of setae, but they are not 

 plainly visible. The glandular portion of each nephridium 

 consists of a loop , the two limbs of which are spirally 

 wound round each other; this part of the organ opens 

 into the distal portion of a long, wide coecum , which 

 with its proximal end extends on to the middle of the dor- 

 Notes from the Leyden Afuseuin, "Vol. IX. 



