170 



Proceedings of the Royal trlsh Academy. 



2. The 20th segment on the right side is double on the left. 



3. Segments 33 and 34 on the left side correspond to 4 segments, 32-35, 



on the right side 



14 



20 



28 

 32 

 35 



46 

 50 

 53 



Girdle <^ 

 59 



65 



2D 

 21 



33 

 34 



46 



53 

 54 



66 

 67 



Fig. 2. — Ventral view of Hehdrilus relietus. 



4. Segment 46 on the right side corresponds to 45 and 46 on the left 



side. 



5. Segment 53 on the right side corresponds to 53 and 54 on the left side. 



6. Segment 65 on the right side corresponds to 66 and 67 on the left side. 



Prominent ventral papillae occur on segments 19 and 20 right side, 19 

 and 21 left side. There are also papillfe on segments 50, 51, 59 right side, 

 50, 51, 60, and 62 left side. 



On the right side, the clitellum covers segments 50-59, and the tubercula 

 stretch as an unbroken line over segments 51-58. On the left side the 

 segment corresponding to 53 is divided, and the tuberculum is interrupted 

 at this point. 



On segments 24 and 25 (right side) there are two pairs of small but 

 distinct pores just above the ventral setae. The male pores open on 

 segment 28, and are surrounded by very indistinct glandular prominences. 



