30 DESCRIPTIONS OF EAHTII WORMS. 



B. pallida, especially with regard to the appearance of the 

 peuial setae; however these setae seem not to be quite 

 similar, for, according to Michaelsen's description and figures, 

 they are of larger size, more curved and only furnished 

 with tubercles at their concave side. Also his description 

 of the prostata-glands »sehr fein, schlank, schlauchformig" 

 does not exactly correspond to our species. As Michaelsen 

 however only had a single specimen at his disposal, and 

 his description therefore remained somewhat incomplete, it 

 is difficult to decide whether our specimens belong to the 

 same species. 



Leyden Museum, ,lune 1899. 



Notes Irom the Ley<leii JMuseutn, Vol.X.IX.1. 



