ON BENHAMTA CCECIFERA, N. SP. Ill 



earthworms, Allolobophora and Lumbricus, and is 

 probably of similar value here. 



In extent of the clitellum (Segments xiii — xxiii inclusive) 

 it recalls B. rosea, Mich., in vrhich it ceases on the 22nd 

 segment. But in this species the paired sperraathecal and 

 oviducal pores are connected by transverse grooves ; further, 

 penial chsetse are present, and the shape of the '' ventral field " 

 is quite different. Again, no mention is made of copulatory 

 pits or tubercles. 



To B. inermis, Mich., our present species presents a greater 

 likeness, in that there are no penial chsetse but there are 

 copulatory tubercles (" pubertats-tuberkeln ") ; these are, how- 

 ever, arranged on quite a different plan. There appear to be 

 about twelve or more pairs of them ; the first pair on Segment 

 VIII, then follow seven pairs situated at the intersegmental 

 grooves of as many segments^ all in front of the clitellum ; 

 there are four more pairs within the clitellar region. Each pit 

 leads into a sac projecting into the body cavity. This associa- 

 tion of the presence of copulatory papillae and pits with the 

 absence of penial chsetse is worthy of note. 



Another large species, B. itoliensis, is known only from 

 its anterior end. This species was found at Itoli, on the 

 Victoria Nyanza, and though in general it appears to resemble 

 B. ccBcifera, yet the possession of penial chsetse and absence 

 of copulatory pits (as well as other features) serve to distinguish 

 the two from one another. 



