•604 NOTES ON AUSTRALIAN EARTHWORMS, 



The buccal ring rather broad (from before backwards) ; the 

 second segmeat narrower, ribbed like the buccal ring, and faintly 

 bi-annulate ; each of the next three segments broader (from 

 before backwards) than the one which precedes it ; all of them 

 divided into two principal "annuli by a well-marked groove, 

 the anterior annuli less distinctly again sub-divided into two ; 

 from segments vi to about xiv the maximum of length is 

 reached, and these segments a)-e usually veiy conspicuously tri-an- 

 nulate, or some or all of the annuli may be subdivided into two, 

 giving altogether six annuli to a segment ; the next seven seg- 

 ments successively diminish slightly in breadth (from before 

 backwards), after which they are of nearly uniform width for the 

 rest of the body, and are faintly tri-annulate. 



Clitellum wanting in the smallest specimens, fairly developed 

 in one specimen, and distinctly indicated in all the large speci- 

 mens by a difference of colour and by a slight glandular develop- 

 ment ; commencing with the middle or posterior annulus of xiii 

 and including xxi (that is eight complete segments in addition to 

 part of xiii) ; complete all round except for the intersegmental 

 areas on the posterior ventral portion now to be mentioned. 

 Between xvii and xviii, extending on to the posterior margin of the 

 former and the anterior margin of the latter is a slightly swollen 

 ai*ea or ridge of a lighter colour, about 2 mm. in width from before 

 backwards (as it appears in an ordinary spirit specimen), and 

 about 13 mm. from side to side extending outwards a little beyond 

 (about 2mm.) the second seta on each side; at the junction of 

 xviii and xix a somewhat similar but broader (from before back- 

 wards) and more depressed area separated from the preceding one 

 •by a narrow portion of the middle annulus of the segment, and 

 near its extremities shewing two very slight papilhe which are 

 about 9 mm. apart, and about in line with the setse of the second 

 row on each side ; at the junction of xix and xx an area similar 

 to the tirst-mentioned one. 



Setae of the ordinary shape, with a slight sigmoid Hexure, about 

 •49 mm. long, with a slight enlargement at about J from free tip ; 

 in eight longitudinal I'ows forming four series of pairs, the setse 



