534 OLIGOCHAETA 



(2) Acanthodrilus parkeri (NEW SPECIES). 



Definition. Length, 1 84 mm. ; breadth (at clitellum), 9 mm. ; number of segments, 1 85. 

 Clitellum, XIII-XIX (?). Male pores on very slightly prominent papillae, corresponding 

 to ventral pairs of setae, those of each side connected by a straight longitudinal groove. 

 Prostomium complete. Setae paired. Dorsal pores visible in posterior region of body 

 only. Gizzard rather elongated in VI, VII ; calciferous glands in XIV, XV, XVI ; 

 the two last pairs much the largest. Intestine begins in XVIII, typhlosole inconspicuous. 

 Ten septa following the gizzard are thickened, particularly the second and the next six. 

 Nephridia paired and alternate. Dorsal vessel single; four pairs of hearts are in 

 X-XIII. Sperm-sacs in XI, XII, flattened and oval. Penial setae stout and curved 

 like an f ; extremity thick and blunt without any ornamentation. Spermathecae, each 

 with two well-marked diverticula of a mulberry-like appearance; occasionally three 

 diverticula present. Hal. New Zealand. 



(3) Acanthodrilus novae-zelandiae, BEDDARD. 

 A. novae-zelandiae, BEDDARD, P. Z. S., 1885, p. 813. 



Definition. Length, 280 mm. ; breadth (at clitellum), 10 mm.; number of segments, 240 

 (about). Clitellum, XIV XIX ; a median area lies between ventral setae from segment 

 XVI onwards. Male pores corresponding to ventral pairs of setae, those of each side 

 connected by a straight longitudinal furrow, which passes exactly between two setae of 

 segment XVIII. Prostomium complete. Setae paired. Dorsal pores in posterior region 

 of body. Body square in outline posteriorly with sloping sides ; setae implanted at the 

 angles. Gizzard in VI, VII ; calciferous glands hardly developed, but walls of oesophagus 

 in XIII-XVI thick and vascular. Intestine begins in XVIII, typhlosole slight. First 

 septum in front of gizzard separating V/VI ; this and following segment which embraces 

 the gizzard at about the middle, thin and membranous. The ten following septa 

 thickened, particularly those separating segments IX/XVI. Nephridia paired and alternate. 

 Dorsal vessel double, the two tubes uniting temporarily when they traverse the septa; 

 hearts in X-XIII. Sperm-sacs in XI, XII. Spermathecae with a single mulberry-like 

 diveriiculum, often lying in front of the septum, behind which lies the pouch. Penial 

 setae not ornamented. Hab. New Zealand. 



(4) Acanthodrilus rosae, BEDDARD. 

 A. Rosae, BEDDARD, Q. J. M. S., vol. xxx, 1 890, p. 434. 

 Definition. Length, 250 mm. ; breadth, 10 mm. ; number of segments, 236. Colour dark 



