244 FRANK E. BEDDARD. 



species belong to the family Eudrilidse, and to that section of 

 the family characterised by unpaired male genital orifices, 

 which are grouped together under the name of "Teleudri- 

 linen" by Dr. Michaelsen. 



The worms which I received from Mr. Woodward belonged 

 to two species ; the majority of the specimens were small 

 slender worms, apparently referable to Michaelsen's Stuhl- 

 mannia variabilis. There were also about a dozen large 

 worms which I refer to the genus Polytoreutus, but dis- 

 tinguish as a new species. 



§ External Characters. 



Polytoreutus magilensis is a larger species than P. 

 coeruleus. An individual which 1 selected for measure- 

 ment was 14| inches in length, with a diameter of 8 mm. ; 

 this specimen consisted of 270 segments. 



The colour of the preserved worms is of a dark violet 

 dorsally, and yellowish below. The pigment is seen on a 

 microscopic examination to be disposed in a network on each 

 segment. The clitellum is yellowish. 



The prostomium is broad, and is not continued on to the 

 buccal segment. The setae are disposed as in the only other 

 species of the genus ; the dorsal setee are strictly paired, the 

 distance between the two setae being about half that which 

 separates the two setae of the ventral pair. On the anterior 

 segments there is a tendency for the setae to become obsolete; 

 this is a rare occurrence among the terricolous Oligochaeta, 

 though not uncommon among the lower aquatic Oligochaeta. 

 There was nothing remarkable about the form of the setae, and 

 there were no modified setae anywhere. On a good many seg- 

 ments of the body — particularly upon those behind the cli- 

 tellum — there were a series of points conspicuous from the 

 absence of pigment, and lying between the setae ; they have 

 much the appearance of setae when examined without the 

 aid of a lens ; and as tliey lie between the real seta^, they 

 give the worm the look of a Perichaeta — a resemblance 

 which is increased by the fact that the segments are for 



