io8 



IJRITISH ANNELIDS. 



Clitellum composed of five, six, eight, or more segments, in the British 



species, commencing on the 24th or some more posterior segment. 

 Male pores on segment 15 as in Lumbricus. 

 Tubercula pubertatis variable : absent, on alternate segments, or 



forming a band along part or whole of the ventral side of the 



clitellum. 

 Colour more variable than in Lu?nl>ricus : red-brown, rose-red, flesh, 



sienna-brown, yellow, green, or grey. 

 First dorsal pore either between segments 3 and 4, or posterior to 



this. 

 Spermathecae absent or variable in number. 



This popular exposition may be made clearer by a tabular 

 presentation of the leading characteristics of the three genera. 



Tabular View of the Lumbricidi. 



