THE OLIGOCH^TA TERRICOL^. PART I. 189 



ventral median line, and that it is not merely a question here 

 of the persistence of 3 or 4 setae. It should be noted in rela- 

 tion to this matter that all the 6 examples possessed setse; thus 

 there is no doubt as to the genuinely specific character of the 

 permanence of setss upon the clitellum. 



The dorsal pores commence on the intersegmental furrow 

 XII/XIII. The oviducal pore or pores (for I could not distin- 

 guish the actual orifice or orifices) are borne upon a very 

 conspicuous, transversely oval, field, contrasting by its whitish 

 color with the surrounding brown clitellum. This field, more- 

 over, is delimited by a groove which encircles it. This area, at 

 any rate in those examples where it was most plainly delimited, 

 obviously lies in front of the circle of set^e of segment XIV. 



The male pores, as is always the case in those species of Phe- 

 retima where there is no terminal bursa copulatrix, are not at 

 all conspicuous, and in the present species they are less so, even 

 less than is usually the case, because of the genital papillse which 

 practically surround them. The pores lie actually in the line of 

 the circle of setse and are separated from each other by about 8 

 setae. They are thus distinctly upon the ventral surface of the 

 body (that is, they are not lateral in position), and in the intact 

 worm there is some space visible to the right or left of each pore 

 as the case may be. The large size of the genital papillse, which 

 nearly touch in the middle line, gives the erroneous impression 

 that the male pores are closer to each other than is actually the 

 case. 



The most noteworthy fact about the intersegmental septa of 

 this species is the presence of a well-developed septum^ separating 

 segments IX/X. I am disposed to connect the presence of this 

 septum with the existence of a well-developed pair of sperm sacs 

 in segment X ; or rather, perhaps, the presence of the latter is 

 to be connected with the existence of this septum. This septum 

 and the two which follow are rather stronger than the rest of 

 those behind ; so, too, are intersegmental septa VI/VII and VII/ 

 VIII. The septum VIII/IX is absent as a complete septum. I 

 have found traces of it in the form of a muscular band attached 

 to the intersegmental furrow VIII/IX. 



The large intestine commenced with the XVth segment. The 

 caeca are not large, but traverse 2 segments. The gizzard is 

 rather elongated. 



The last pair of hearts is in segment XII. 



The sperm sacs of this species are in 3 pairs, situated re- 

 spectively in segments X, XI, XII. The sperm reservoirs are not 



