THE OLIGOCH^TA TERRICOL^. PART I. 191 



were so. I am disposed to think that the specimen in which I 

 found only 4 pairs of spermathecje had the last pair lost in the 

 course of dissection, but I am not certain. Each spermatheca 

 has a rather long and very narrow muscular duct. The diver- 

 ticulum, which ends in a club-shaped, distal extremity, is aiout 

 one-half the length of the spermatheca, and opens into the duct 

 of the latter near its external orifice. 



Pheretima albobrunnea sp. nov. 



Two examples of a rather slender species of Pheretima were 

 collected at the same time and from the same locality as the last 

 species, Pheretima orientalis, and were provisionally assigned to 

 that species from which, however, they obviously differ. The 

 color and the general external appearance is identical with those 

 of P. orientalis, a fact which led to the original confusion between 

 the two. Further than this the clitellum and its setae and, in- 

 deed, all the external characters, with the exception of the male 

 pores and the genital papillze, are precisely as in P. orientalis. 

 The male pores, like those of P. orientalis and of most if not all 

 species of Pheretima, are in the line of setse. They are, however, 

 distinctly farther apart than in the last species and are separated 

 by some 18 to 20 setfe. The pores themselves are equally small 

 and inconspicuous. The genital papillse of Pheretima albobrun- 

 nea are quite different from those of Pheretima orientalis; nor 

 can the differences be put down, I think, to greater immaturity 

 in the case of one set of worms or of the other; nor were there 

 intermediate stages between the two. In the present species, 

 the papillce are smaller than in the last, and rather sucker-like, 

 a depression occupying the middle of each papilla. The positions 

 occupied by the papillag are the same ; that is, one lies anteriorly 

 and one posteriorly to the male pore, and they are both upon the 

 XVIIIth segment. The difference between these papillae and the 

 large flat papillae of P. orientalis is very obvious. 



The internal structure of this worm is very like that of P. 

 orientalis, but shows, nevertheless, sufficient differences to dis- 

 tinguish the two very plainly. The septum dividing segments 

 VIII/IX is absent; but the following septum, which is, also, 

 frequently absent among earthworms ^ of this genus, is present 

 and rather thickened. So also are septa VI/VII and VII/VIII. 

 The large intestine commences in segment XV. The casca are 

 present and extend forward through 3 segments. The gizzard 

 is rather elongate, but otherwise is not remarkable in its form. 



' Compare, for example, P. benguetensis described in the present paper. 



