THE OLIGOOH^TA OF NATAL AND ZULULAND. 455 



gus witli a pair of chyle-pouclies in the ninth segment. 

 No muscular gizzard. (Part of sul^-fam. Ocnero- 

 drilina;). . Kerria gunningi Mich. 



14 a. One pair of spermathecal pores at the furrow between 



the eighth and ninth segments. No copulatory wall in 

 the region of the clitellum. A pair of large chyle- 

 pouches proceeding from the oesophagus in the hind 

 part of the ninth segment and stretching f j-eely forward. 

 (Part of sub-fam. Ocnerodrilinaj). 



Ocnerodrilus africanus (Bedd.) 

 14b. Spermathecal pores more than one pair, either placed 

 furthei- back than the ninth segment, or three pairs at 

 the intersegmental furrows of segments 6-9. Copula- 

 tory walls present in the region of the clitellum. A 

 large muscular gizzard. Chyle-pouches, if present, in 

 the ninth segment, not stretching fi'eely forward. (Fam. 

 Glossoscolecidse). . . . .15 



15 (/. Three pairs of spermathecal pores at the intersegmental 



furrows of segments 6-9. Seta; at the hinder end of the 

 body distinctly enlai'ged, not placed in eight regular 

 longitudinal rows. (Sub-fam. Glossoscolecina?). 



Pontoscolex corethrurus {Fr. Midi.) 



15 b. Spermathecal pores further back than the ninth segment. 



Seta5 at hinder end of the body not distinctly enlarged, 

 placed in eight regular longitudinal rows. (Sub-fam. 

 Microchsetina^). . . . 16 



16 a. One pair of spermiducai funnels in the tenth segment. . 17 



16 b. Two pairs of spermiducai funnels in the tenth and eleventh 



segments. . . . . .22 



17 o. Copulatory walls extending over the whole length of the 



clitellum. viz. over the segments 12-23 or 24. 



Microchaetus beddardi Beiih. 



17 b. Copulatory walls occupy only apart of the length of the 



clitellum, less than half of it. . . . 18 



18 a. Copulatory walls occupy more than four segments, viz. 



sixteenth to the twenty-second segment. Sexual setae 

 2"5-3-4 mm. long, nearly straight, distal end of the 

 shape of a bird's head, distal part with internal annula- 

 tion and external toothed transverse ridges. 



Microchaetus zuluensis Bedd. 



ISb. Copulatory walls occupy four segments or less. . , 19 



19(1. Copulatory walls occupy the three segments 17-19. . 20 



