THK OLIGOCH.ETA OP NATAL AND ZULULAND. 423 



specimen. I am convinced that the specimens collected by 

 Dr. Warren and W. G. Rump at Pietei-maritzburg belong to 

 this species, although they seem to differ considerably from the 

 type. It is probable that these differences depend upon the 

 different state of development, as the type is not quite mature. 

 At any rate the difference in the shape of the sexual seta3 is 

 to be so regarded. 



Since the type was immature and badly preserved, I now 

 give .a complete description founded on mature and better 

 preserved specimens. 



External Characters. — Dimensions of the smallest and 

 largest specimens : length 118 and 170 mm., breadth 4'5 to 

 7 mm. and 6 to 7 (at clitellum 9) mm., number of segments 

 232 and 297. 



Colour smoke-grey dorsally, and yellowish-grey ventrally. 



Head prolobous. The prostomium, first, second and fore- 

 half of third segment are longitudinally furrowed. The first 

 and second segments are simple, third segment irregularly 

 biannulated. The furrow of annulation and the furrows 

 between the first and second segments and the second 

 and third segments are not quite regular. The fourth to 

 the ninth segments are divided into two segment-like ringlets. 

 Front ringlet of the fourth segment is slightly biannulated; 

 all the other innglets, are simple. Fore-ringlets, bearing seta? 

 and nephridial pores, of fourth to the eighth segments are 

 somewhat larger than the hind-ringlets. The tenth and 

 following segments are simple or indistinctly biannulated. 



Seta3 begin in the third segment ; in general they are 

 rather small. One from the sixth segment measured 0"5 mm. 

 in length, and 45 fx in thickness, and Avas rather strongly 

 bent into an S- The setee had an indistinct ornamentation, 

 consisting of irregular and broad scales running mainly in a 

 transverse direction. The sette are strictly paired. The 

 median dorsal distance of the setae is a little smaller than 

 half the circumference of the body {dd=circa, ^^ u). Median 

 ventral distance of setaB about as large as the middle lateral 

 distance {aa = circa he). Towards the region of the clitellum 



