Report upon the Oligochaeta. 



Internal Aiuttonn/. Penial setae in general shaped like those of 

 the typical form, but differing in the shape of the ornaments, which 

 in this variety are not sharply pointed smooth thorns, hut more 

 clumsy protuberances, the distal slope of which is roughened by a 

 rather large number of very small roundish or pointed knobs. 



Spermathecae : Ampulla apparently constantly with a neck-like 

 contraction at the middle. 



In other respects like the typical form. 



CHILOTA CAPENSIS (Bedd.). 



1885. Acantliodrilus capensis, Beddard in Proc. Phys. Soc., Edin- 



burgh, viii., p. 370. 



1886. Acanthodril/i* cujx'nxis, Beddard in P. Zool. Soc., London, 



1885, p. 170. 

 1895. Antliodrilus capcu^i*, Beddard in A Monograph of the Order 



of Oligochaeta, Oxford, 1895, p. 539. 

 1900. Chilota capensis, Michaelsen in Tierreich, x., p. 147 



Loc. Cape Colony (without further notes, types of Acanthodrilus 

 capensis}, Moddergat, near Lynedoch in the Stellenbosch district ; 

 L. Peringuey, leg. 



External Characters. Length 90-110 mm., maximal thickness 

 6-7 mm., number of segments 80-146. 



Colour dorsally light brownish grey, like smoke. 



Head tanylobous. 



Setae at the hinder end somewhat enlarged, in general ventrally 

 narrowly or widely paired, dorsally separated; at the 8 segment 

 aa : ab : be : cd 6 : 4 : 8 : 9 ; at the hinder end aa : ab : be : ccl = 

 6:4:6:6; ab towards the male pores diminishing ; eld -= ca. yu. 



Nephridial pores generally in c. 



Clitellum at 1 13-18 segments (= 5). 



Prostate pores in b upon small papillae. 



Seminal furrows slightly bent, laterally convex, passing the 18 

 segment laterally from the setae ab which here are normally 

 developed. 



Spermathecal pores at 7/8 and 8/9 in b. 



Copulatory organs : Ten pairs or less of copulatory cushions or 

 papillae at or near the ventral pairs of setae (at a part of the segments 

 7-21). 



Internal Anatomy. Septa 6/7-13/14 thickened, the septa 9/10 

 and 10/11 very strong. 



Alimentary tract : A large gizzard in the 5 segment. No calci- 

 ferous glands. 



