954 NOTES ON AUSTRALIAN EARTHWORMS, 



Clitellum complete all round, comprising three complete segments 

 — xiv to xvi, while in addition a portion of xin or of xvn or 

 of both may be included. Setae and dorsal pores visible on the 

 clitellum. 



Setae short, about '28 mm. long, relatively stout, a slight 

 enlargement between the middle and the free tip but nearer the 

 former ; arranged on conspicuous ridges, the rows being interrupted 

 for a narrow space in the median dorsal and ventral regions ; the 

 number of setae per segment is about 28, but in the caudal region 

 there may be from 32 to 36. All the segments setigerous after 

 the first. 



Male pores on papillae on xviii about in a line with the second 

 row of setae on each side. The two apertures of the oviducts are 

 on a small elliptical area on xiv, one on each side of and close to the 

 median line. The apertures of the spermathecse are between vn 

 and viii, and vm and ix, rather ventral in position and about in 

 a line with the second or third row of setae on each side. Dorsal 

 pores present after segment iv. Nephridiopores not visible. 



On segments ix and x there is a characteristic arrangement of 

 what are probably adhesive discs. The ventral portion of these 

 segments for the whole or nearly the whole breadth of them, and 

 extending outwards on each side to about the second row of setae is 

 raised and thickened, and carries four circular pits or perhaps pores, 

 one in front of and one just behind the setigerous ridge on each 

 side. The areas may or may not be subdivided into two by a median 

 longitudinal groove ; they may be fairly rectangular, or each of 

 them may consist of two 8-shaped areas side by side, the outlines 

 of the 8's being very broad, with the pit or pore in the centre of 

 each half (fig. 6). All my specimens show these structures, the 

 arrangement of which at once distinguishes them from any other of 

 our known worms. 



The mesenteries from the anterior one of segment vm to the 

 posterior one of xin are thicker than elsewhere. 



The alimentary canal presents the usual divisions ; the muscular 

 pharnyx coated with a white glandular mass occupies about three 



