70 



parated by a narrow membranaceous interval , and three calca- 

 reous glands in segraents XIV, XV and XVI. 



This species is closely allied to B. Stuhlmanni ^) and B. afflnis 

 from the Zambesi; as Michaelsen however gave a detailed des- 

 cription of the first species and moreover kindly forv^arded me 

 tveo specimens for comparison, I have no doubt about the speci- 

 fical difference of the Congo-worm. B. Stuhlmanni has a more 

 compressed shape and diflers as well by the feature of the cli- 

 tellar area as of the penial setae. B. aj^nis is characterized by 

 the presence of two copulatory papillae, of which there are also 

 a great number with B. inermis ^) from Togo. In B. scioana ^) 

 the penial setae are straight and plain , and in B. itoliensis ^) 

 from Victoria-Nyanza these organs are also without distinct 

 markings, but with a curved tip. 



Fig. 1. Ventral view of segments XI — XXI, showiner the clitellar area. 

 X 4 cliam. Fig. 2. Penial seta. X 30 diam. 



» 3. A spermatheca. X 8 diam. 



Leiden, 28 Dec. 1893. 



1) Jahrb. llamb. Wissensch. Anstalten , VII, 1890, p. 5, pis. 1 and IV. 



2) Archiv für Naturgesch., 1892, p. 1, pi. XIII, fig. 1. 



3) Ann. del Museo Civ. di Stor. Nat. di Genova , 2d. Ser., Vol. VI, 1888, p. 586. 



4) Jahrb. Hamb. Wissensch. Anstalten, IX, (2), 1892, p. 3, fig. 6. 



