€10 NOTES ON AUSTRALIAN EARTHWORMS, 



independently form sinuous series, the latter may on some 

 segments be in line with or ventrad of the outermost setse on these 

 segments, and in a few instances the nephridiopores were in line 

 with the third seta on each side. Some of them are as much as 

 5 mm. dorsad of the fourth seta, and not very far from the median 

 dorsal line ; sometimes they alternate irregularly for some distance, 

 at other times they form short ascending and descending series. 



Alimentary canal : the very muscular pharynx and the short 

 oesophagus occupy about the first four segments ; the large 

 gizzard is in v ; in the next two segments the small intestine is 

 narrow and white, while in segments viii to xvi, especially in the 

 last two or three of these, the portion in each segment is globu- 

 larly dilated and very vascular, some of them probably functioning 

 as calciferous glands (in one specimen white masses effervescent 

 on the addition of acid were found in all but the first of these 

 segments), but there are no kidney-shaped diverticula as in i\^. 

 camdenensis ; the large intestine commences about xix, without 

 any very marked increase in calibre, much folded and convoluted 

 in contracted worms. 



Genitalia : vesiculse seminales two pairs of racemose sacs, a 

 pair in each of segments ix and xii, the first pair attached 

 to the anterior face of the mesentery between ix and x, the hinder 

 pair to the posterior face of that between xl and xii ; testes in x 

 and XI, in each of which segments also is a pair of ciliated rosettes ; 

 prostates two, in xvill, or partly in this and partly in the 

 next segment, long and narrow, a few times folded, proximally 

 continuous with the short genital duct ; no penial setse were met 

 with, nor were the vasa deferentia visible. Ovaries in the usual 

 position in xiii ; the oviducts commence opposite them in xill and 

 open to the exterior in the next segment : spermathecfe five pairs, 

 one pair in each of segments v-ix, pear-shaped stalked pouches 

 without cseca, opening anteriorly. 



There are nine pairs of "hearts" of which the last pair is in 

 XIII, this and the three preceding pairs very large and arising 

 partly from a secondary small supra-intestinal vesspl commencing 

 in IX. 



