MEGASCOLEX MUSICUS. 193 



reaching a little beyond the half of the vesicle. The tes- 

 ticular sacs in the 11th and 12th segment; there are two 

 large , multilobed prostatic glands , extending over three 

 segments (17th — 19th), each opening by a S-like curved, 

 thick- walled duct; the vas deferens of each side is joining 

 this duct. 



The anterior side of the 5th and 6th septum , like the 

 inner-side of the body-wall of the 7th, 8th and 9th seg- 

 ment are densely covered with glandular tubes ; as usual 

 the 8th and 9th septum are wanting. 



Length 220 m.m. 



Hab. Japan (von Siebold). 



Megascolex musicus n. s. 



A. G. Vorderman, Bijdrage tot de kennis van den Son- 

 darie-worm (Nat. Tijdschr. Ned. Indie, Dl. XLI, 1881). 



Cephalic lobe extending nearly over the whole length 

 of the buccal segment. 



Each segment, except those of the cingulum, with a 

 circular ridge , which carries the bristles to the number of 

 100. Orifices of the copulatory pouches between the 7th 

 and 8th , 8th and 9th segment. Two large slit-shaped 

 genital pores on the 18th segment; the opening of the ovi- 

 duct is a small pore on the 14th segment. Between the 

 12th and 13th (or 13th and 14th) ring we find the first 

 dorsal pore. The two pairs of copulatory pouches are si- 

 tuated in the 7th and 8th segment ; each pouch consists 

 of two parts , a large , pear-shaped vesicle with short duct , 

 and a long tube rolled up in numerous windings. Male 

 genital organs in the 11th and 12th ring; their vasa de- 

 ferentia beginning each with two funnel-shaped mouths. 

 There are two large prostatic glands , divided in numerous 

 lobes. Bunch-like ovaries in the 14th segment, hanging 

 on the posterior side of the 13th septum. The 8th and 

 9th septum are wanting , the second copulatory pouch 

 therefore situated in the 8th as well as in the 9th ring. 



Notes from the Leyden ]Miiseuin, "Vol. V. 



13 



