ZOOL— Vol. II.] EISEN—OLIGOCH^TA. 1 73 



Spermathecce, two pairs in VIII and IX, retort-like, with a small, short- 

 stalked, ear-like diverticle below the center. No specialized spermathecal 

 setae. 

 Septal formula: — 



VI/VII, VII/VIII, VIII/IX, IX/X, X/XI, XI/XII. 



Habitat. — Omaha, Nebraska. 



The above definition is taken from Ude's description. 

 There is in my mind some doubt about the position of the 

 spermathecal pores in Dij[)locardia verrucosa. Ude says that 

 the pores are situated on the anterior third of IX and X, 

 and between the setae d. In specimens sent me by Dr. 

 Frank Smith labeled D. verrucosa, the spermathecal pores 

 are situated in IX and X, as described by Ude, but the 

 pores are a little dorsal to setae a. However, we must for 

 the present accept Ude's statement, twice repeated (pp. 133 

 and 135), and will therefore assume that the specimen sent 

 by Dr. Smith belongs to a different species, also belonging 

 to the subgenus Omahania. What throws a doubt on the 

 position of the spermathecal pores is the fact that Ude 

 (5, p. 135) states that the ovipores also open between setae 

 d. His fig. 14, however, shows that these pores open nor- 

 mally, that is, ventral to setae a. The references to set^e d 

 may be a misprint in both instances. D. verrucosa, as well 

 as the species sent me by Dr. Smith, differs also from all 

 of the Diplocardias in the position of the spermathecal pores 

 in IX and X. In no other species is a spermathecal pore 

 found in X. This may possibly be a characteristic of the 

 subgenus Omahania. 



Subgenus Diplocardia Gar man. 

 Diplocardia Eiseni (Michaelsen). 



Geodrilus Eiseni Michaelsen, Zool. Jahr., Abth. Syst. Bd. VIII, 1894, p. 177. 

 Diplocardia Eiseni (Michaelsen) Eisen, Zool. Bull., Vol. II, No. 4, 1899. 



Definition. — Color, dorsally dark brown, pigmented, clitellum violet gray. 

 Size, 150 mm. by 2 mm. Somites 165; VIII-XIII smoother and wider than 

 the others. Prostomium divides somite I about one-half, with the lateral 

 margins strongly converging. Dorsal pores, most anterior one on XI, first 



