NEW SPECIES OF OCNERODRILUS. 281 



say at present is, that Ocnerodrilus and Gordiodrilus 

 are connecting links which, through their relationship 

 with Pontodrilus, Photodrilus, Microscolex and Pygma^o- 

 drilus, connect the limicolid oligocha^ta? with the higher 

 terrestrial forms. 



I append some diagrams to show the arrangement of the 

 several organs, etc., in the genera, which may be best 

 compared with Ocnerodrilus. Some of these diagrams 

 are borrowed from Benham's admirable paper (An At- 

 tempt to Classify Earth Worms). The diagram of Gor- 

 diodrilus has been compiled from Beddard's paper on 

 this genus. 



