616 NOTES ON AUSTRALIAN EARTHWORMS, 



the genital duct then gradually increases in calibre, and is bent in 

 U-shape, the limbs lying close together, and the convexity of ^ it 

 looking backwards ; beside the proximal portion of each genital 

 duct is a pair of small white sacs, each of which contains a delicate 

 tajjering curved penial seta about 2-5 mm. long, minutely spinose 

 towards the curved tip. The ovaries and oviducts have the 

 usual situation and relations : the three pairs of spermathecse 

 ai'e in segments vii-ix, and are stalked pouches, each with a very 

 rudimentary club-shaped caecum coming off at the junction of the 

 stalk and the pouch. 



The last pair of hearts is in xiii. 



The nephridia are two series of pairs of tubules ; those corres- 

 ponding with the outer rows of pores look like small vesicles, and 

 are in alternate segments ; those of the second series have the 

 usual situation, and are delicate and convoluted, a pair in each 

 segment except some of the anterior ones, but I have not succeeded 

 as yet in finding a corresponding consecutive series of nephi'idio- 

 pores. 



Seven mesenteries commencing with the anterior one of vii are 

 thicker than the others. 



Hah. — The banks of the Darling River between Bourke and 

 Brewarrina, N.S.W. 



The three pairs of sperm athecse at once distinguish this species 

 trom those previously described. My specimens were sent to me 

 by my relative Mr, H. J. Fletcher, who found one by accident, and 

 obtained the others by digging for them. 



PERICHiETA BaKERI, n. Sp. 



Of nine specimens three are fragmentary ; length of six (spirit) 

 specimens, most of them about halfgrown, from 47 to 92 mm., 

 bi-eadth from 4 to 6 mm. ; number of segments from about 120 

 to 140. Colour dar-k reddish or purplish brown above, darkest in 

 anterior part of the body, much lighter below, the change of 

 colour anteriorly at the level of about the 6th seta on each side, 

 further back at about that of the tenth. Prostomium completely 

 divides the buccal ring, marked superiorly by a median longitu- 

 dinal groove. 



