420 
HORN EXPEDITION—ZOOLOGY. APPENDIX. 
Ovaries in segment 13, into which the oviducts open. 
Spermatheca, two pairs; one each in segments 8 and 9. Each consists of a 
sac with two diverticula (1) a small knob-like process close to the opening, and 
(2) a long, tubular, and at times somewhat coiled process, which may be as long as 
or longer than the sac. 
Habitat .—Soil by the sides of waterholes at Illamurta in the James Range, 
Bagot’s Ci’eek in the George Gill Range, and the Finke Gorge in the McDonnell 
Range. 
EXPLANATION OF PLATE XXIX. 
Acanthpodrilus eremius. 
Fig. 1.—Diagram representing the external anatomy. 
,, 2.—Diagram representing the alimentary canal, circulatory system, and 
disposition of the nephridia. 
,, 3.—Diagram representing the reproductive system. 
,, 4.—Pair of seta?, drawn under the camera lucida, much enlarged. 
„ 5.-—Spermatheca, drawn under the camera lucida, much enlarged. 
