DESCRIPTIONS OF EARTHWORMS. 237 



EXPLANATION 



OF 



Plate 10. 



Fig. 1. Perichaeta vordermanni Horst; ventral view of seg- 

 ment 17 — 19, to show the papillae and grooves in 

 the vicinity of the male pores, x 3 diam. 



Fig. 2. Spermatheca of the same species, x 8 diam. 



Fig. 3. Prostata and ventral glandular thickenings of the 

 same species. X 3 diam. 



Fig. 4. Perichaeta sluiteri Horst ; spermatheca. x 8 diam. 



Fig. 5. Prostata of the same species. X 9 diam. 



Fig. 6. Perichaeta musica Horst; spermatheca. X 4 diam. 



Fig. 7. Perichaeta annulata Horst; spermatheca magnified. 



Notes from the Leyden Miuseum, Vol. X.II. 



