966 NOTES ON AUSTRALIAN EARTHWORMS, 



dorsal trunk is a second small longitudinal vessel adherent to the 

 alimentary canal, from which the hearts in this segment seem 

 to arise. 



The segmental organs are probably the small tufts of glandular 

 tubules attached to the ccelomic wall, most conspicuous in the 

 oesophageal segments where they are also attached to the mesenteries. 



Hah. — Barron River District, North Queensland (Macleay 

 Museum). 



Pericileta Darnleiensis, n. sp. 



Two specimens comprising 108 and 79 segments were 155 mm. 

 and 111 mm. long respectively, in both cases the breadth being 

 6 mm., and the length of the preclitellar region 29 mm. Body 

 cylindrical tapering anteriorly and posteriorly. Prostomium ex- 

 tending back on the buccal ring for about half its width. Segments 

 distinct, rather wide and flat, widest (about 3 mm.) in front of 

 the clitellum as far forwards as about v. From about v to vin the 

 segments are tri-annulate, with the setae on a ridge on the middle 

 annulus ; from ix to xiii they shew five annuli ; in the remaining 

 region the annulation is not quite so distinct but there may be three 

 or five annuli per segment. Segments setigerous after the first or 

 second. 



The setae are about "42 mm. long, with a slight enlargement at 

 about \ from the free end ; arranged in complete circles on 

 conspicuous ridges on the middle of the setigerous segments. The 

 number of setae is from about 60 to 66 per segment, most numerous 

 in the posterior region. 



Clitellum comprises three segments (xiv to xvi), is very thick 

 and complete all round ; a depression on the ventral surface of xiv 

 on which are the oviducal apertures. Neither setae nor dorsal pores 

 visible on the clitellum. 



The male pores are slit-like with plicated lips on xvin, about 

 3 mm. apart, in the line of setae, with about 12 setae on the 

 ventral surface between the pores. In neither specimen were the 

 pores on papillae, but the latter are probably developed in the 

 breeding season. The oviducts in one specimen appear to open by 



