570 NOTES ON AUSTRALIAN EARTHWORMS, 



8. Cryptodrilus rusticus, g. et sp. n. 



One of the Burrawang worms is postclitellian, has eight rows 

 of setae arranged in a peculiar manner, has three or four pairs of 

 accessory gland pores, two pairs in front of, and the others 

 behind the male pores which are on segment xviii, and one gizzard. 

 It cannot therefore be referred to either of the genera Acantho- 

 drllus or Dig aster, and seems to belong to a new genus. 



The best examples I have (spirit specimens) are about 190 mm. 

 long ; 6 to 7 mm. broad ; have a clitellum about 8 mm. long ; the 

 length of preclitellar region short, only 13-15 mm. ; and consist 

 of about 250 somites. Among a number of Burrawang worms 

 specimens (spirit) of this species attract one's attention by the 

 very short preclitellar region as compared both with the clitellum 

 and with the length of the body. 



The body is cylindrical, rather obtuse at both extremities (in 

 contracted spirit specimens). The prostomium is small, somewhat 

 flattened, and in some specimens irregularly grooved anteriorly 

 and inferiorly ; embedded in the buccal segment for about \ of its 

 width. The anterior thirteen segments very distinct, widest from 

 about vi-x, some of them faintly bi-annulate, or tri-annulate as they 

 are further back. The clitellum which comprises about 4J 

 segments, extends from the posterior half of xin up to and 

 including xvn, is thick, glandular, and well developed ; is 

 complete all round except sometimes on the posterior ventral 

 portion of about the last segment of it. On this is situated the 

 anterior pair of accessory gland pores, which are not at first sight 

 readily distinguishable by their appearance from the male pores. 

 Sometimes all the pairs of pores are situated on little elliptical 

 flat-topped eminences ("copulatory papillae") in the enlargements of 

 as many somewhat dumb-bell-shaped depressions, the outlines orrims 

 of which are raised and tumid, of which the second one is on xvm, 

 and the others on the junctions of the two preceding and succeeding 

 segments respectively. The first of these dumb-bell-shaped areas 



