588 OLIGOCHAETA 



This species has been described by Michaelsen as of a brilliant white colour, 

 which is, he thinks, due to the cuticle ; it is not mentioned how the specimens were 

 preserved, but the fact that the white colour is replaced by black when the worms were 

 treated with alkali, is suggestive of corrosive sublimate. I have mentioned as a generic 

 character that there are no sense organs in the integument — I refer, of course, to those 

 characteristic bodies which are found in other genera of Eudrilids. Michaelsen, 

 however, describes 'eine dichte Reihe grauer Plinctchen,' on the anterior segments, 

 which may be these Pacinian corpuscle-Hke bodies. This species and the next are 

 peculiar in the family Eudrilidae by reason of the presence of doraal pores. The 

 intestine commences in the thii-teenth segment, and has a well-developed typhlosole ; 

 septa v/xi are thickened ; the nephridia are stated (with a query) to open by the 

 ventral setae. Michaelsen, in the two papers (6, 12) referring to this species, 

 has illustrated various points in its anatomy. 



(a) Eudriloides parvus, Michaelsen. 



E. parvus, MICHAELSEN, loc. cit., p. 1 5. 



Definition. Length, 40 mm.; breadth, i*i/3 ; number of segments, 98. Dorsal pores present. 

 Clitellum, XIV-XFIIL Genital papilla on XIX. Spermathecal pore on XIII. Fenial 

 setae without ornamentation, pointed at end. Hab. — Quilimane. 



This species was studied from a single example only; hence the account of its 

 structure given by Michaelsen is in many respects incomplete. 



(3) Eudriloides titanotus, Michaelsen. 

 B. titanotus, Michaelsen, loc. cit., ix, 1891, p. 10. 



Definition. Length, 60 mm.; breadth, % mm.; number of segments, 155. Borsat pores 



present. Clitellum, XIV-XVII. Spermathecal pore on XIII, without glands. Penial 



setae with a narrow ridge on either side at extremity, which is irregularly denticulate. 



Hab. — Zanzibar and Kinngasi. 



This species has the same white coloration as has the first species of the genus, 



and alkalis produce the same alteration in its hue ; the prostomium, unlike that of the 



last two species, has no prolongation on to the buccal segment. Michaelsen is 



doubtful whether the clitellum does not commence with the eleventh segment ; at 



any rate, this and the two following segments were ' etwas modificirt.' The intestine 



begins in the sixteenth segment ; septa v/xi are thickened. 



