238 FEANK E. BEDDAED. 



were placed just in front of the nephridiopore of the segment 

 behind ; more usually, however, they are a little dorsal of the 

 nephridiopore. 



The aperture of the sperm-ducts is, as in Stuhl- 

 mannia and Teleudrilus, single and median; it lies at the 

 end of the clitellum, between the 17th and 18th segments. It 

 does not, however, present the appearance of an orifice, but of 

 a prominent hemispherical papilla, as in the case of the ovi- 

 ducal pore ; the papilla is in this case considerably larger. 



In one specimen (that which had four clitellar segments) 

 this papilla was connected by two grooves running obliquely 

 forwards with a pair of conspicuous rounded papillae, placed 

 near to the boundary line between the 17th and 16th segments ; 

 the two grooves diverged from each other at an angle of about 

 40°; each ran along a slight mound-like elevation, as shown 

 in fig. 24 of PL XVIII, and more highly magnified in fig, 19 

 of the same plate. The two papillae are unsymmetrically dis- 

 posed, as also shown in the figure ; the left-hand one is placed 

 just behind the groove separating the 17th from the 16th 

 segment ; the right-hand one at about the middle of the 17th 

 segment. 



In a second specimen (PI. XVIII, fig. 22) the median papilla 

 was quite invisible, owing probably to the worm having died 

 with the part in question retracted. 



In the only other specimen belonging to this species, which 

 was nearly mature, a prominent glandular swelling occupied 

 the middle ventral line between Segments 17 and 18 (PI. XVIII, 

 fig. 20). A careful examination showed that the apparently 

 single protuberance is not to be confounded with the median 

 papilla described in the first of the three specimens ; it really 

 represents the two anterior papillae of the 17th segment closely 

 fused; the groove issuing from each may be detected, and the 

 median papilla itself is visible at the point where the two 

 grooves nearly come into contact. 



In Stuhlmannia variabilis (Michaelsen) the papillae 

 connected with the male eflPereut apparatus show certain re- 

 semblances to those of the present species. 



