6 PROCEEDINGS OF THE NATIONAL MUSEUM. Vol. 66. 



either side of the d setae. The ducts of the second somite and of the 

 clitellar somites which have the more dorsally placed nephridiopores 

 pass through the longitudinal muscle layer at a level considerably 

 dorsad of seta line d. 



The reproductive organs in most respects are similar to those al- 

 ready known in the genus. Paired spermaries and spermiducal 

 funnels have the usual positions and relations in 10 and 11. The 

 sperm ducts of either side are in close proximity in their course- 

 posteriad, but fusion into one duct does not take place until they 

 have reached 21, on which they open to the exterior. The prostate 

 glands are paired in 20 and 22, a position known heretofore only in 

 D. heyesi. The glands are relatively small and each occupies but a 

 small space in one somite. The duct is rather short and the lumen 

 is very definite. It has a diameter i/4 to % as great as that of the 

 gland itself. Sperm sacs are paired in 9 and 12. Ovaries and ovi- 

 ducal funnels are paired in 13, and the paired oviducts have a fairly 

 direct course to their outlets on the next following somite. A pair 

 of ovisacs in 14 have their communications with 13 through openings 

 dorsad of the oviducal funnels and near the esophagus. Paired 

 spermathecae in each of somites 8 and 9 are of relatively small size^ 

 due in part to the fact that the worms were not sexually active when 

 collected. Minute diverticula are attached at the junction of the 

 short sacs with the ducts. In D. keyesi the ducts are relatively much 

 longer and the diverticula are attached to them approximately mid- 

 way of their length. Eisen (1900, fig. 136) figures the length of the 

 duct as about three times that of the sac, while in the new form the 

 lengths of the duct and of the sac are approximately equal. 



LITERATURE CITED. 

 Eisen, Gustav 



1896. Pacific coast Oligochaeta II. Mem. California Acad. Sci., vol. 2, 

 pp. 123-198, pis. 46-57. 



1899. Notes on North American earthworms of the genus Diplocardia, 

 Zool. Bull., VOL 2, pp. 161-172. 



1900. Researches in American Oligochaeta, with especial reference to those 

 of the Pacific coast and adjacent islands. Proc. California Acad. Sci., 

 ser. 3, vol. 2, pp. 85-276, pis. 5-14. 



n 



