644 OLIGOCHAETA 



(22) Acanthodrilus annectens, BEDDAKD. 

 A. annectens, BEDDARD, Q. J. M. S., vol. xxix, 1889, p. 102. 



Definition. Length, about 75 mm. Colour during life 'pink, or white and, pink' 

 Prostomium not completely dividing buccal segment. Clitellum, XIII XIX, saddle-shaped. 

 Male pores in position of seta 2, which is absent, seta \ being present. Sperm-duct- 

 pores to the outside of ventral pair of setae. Gizzard in V ; no calciferous glands. 

 Intestine with well-developed typhlosole. Dorsal vessel double; last hearts in XIII. 

 Nephridia open by outermost setae; the first pair is a ' peptonephridium? Gonads 

 attached to hinder wall of their segments. Sperm-ducts imbedded in body-wall. 

 Spermathecae each with four diverticula, opening on to exterior in front of and to 

 ventral side of third seta. No penial setae. Hab. New Zealand. 



This species and the next form a very distinct pair of Acanthodrilus, as will 

 be seen from a comparison of their characters with those of other species. I have 

 not referred in the above definition to the genital papillae which are present in this 

 as in so many other species of the genus. In one specimen there were a pair lying 

 in line with the ventral pair of setae between segments ix/x ; behind these there 

 was a single median papilla on xv and another on xvi ; in segments xix, xx were 

 three papillae, two on one side of the middle line and one on the other. Another 

 specimen had a papilla on each of segments xviii, xix. 



(23) Acanthodrilus paludosus, BEDDAKD. 



A. paludosus, BEDDARD, P. Z. S., 1892, p. 677. 



Definition. Length, about 25 mm. ; diameter, I mm. Clitellum, XIII-XIX. Setae distant ; 

 the outer setae only of ventral pair on XVII and XIX missing. Male pores correspond 

 in position to missing seta of their segment. Sperm-duct pores to outside of ventral 

 setae of XVIII. Papillae on XI, XII, and XVIII. Gizzard in V and VI chiefly in 

 the latter segment ; intestine begins in XX. First pair of nephridia modified to form 

 a peptonephridium. Sperm-ducts run in the thickness of the body-wall, uniting just at 

 external pore. Sperm-sacs in IX, XI, and XII. Spermathecae each with two small 

 diverticula. Penial setae absent. Halt. Neio Zealand, (in a marsh). 



This species comes nearest to A. annectens ; it dift'ers from it principally in the 



