1887.] 



NEW GENUS OF LUMBRICID^. 



15; 



c itel ar segments are thus modified. This latfer statement I am 

 able to confirm from the study of an Austrahan species of the genus 

 possibly identica with Ilorst's species. But the modification of the 

 setae m the chtellar region of Thamnodrilas is more complete than 



Fig. 3. 



Pig. 2. ThamnodrilmguhelTm. Anterior segments seen lateraUy ; apertures of 

 the nephridia in front of the dorsal pair of setce ; segments of clitellum 

 PV q c .} ^'^'■^^''a^y- Magnified twice natural size. 

 1 ig. 6. beta from one of the segments of the cliteUum; highly magnified. 



in Vrochata, inasmuch as it has affected the dorsal as well as the 

 ventral pairs. The clitellar setae are larger than the ordinary setae, 

 as well as differmg in their ornamentation ; this difference was very 

 noticeable m an immature example, where the difference of age alone 



