THE OLIGOCH^TA TERRICOL^. PART I. 201 



There must be at least 70 or 80 of them and they are partly dis- 

 posed in a series of curves internal to each other upon the inner 

 side of the orifice of the spermiducal glands ; now and then these 

 papillse are not very easily distinguishable from the skin which 

 they cover. Precisely similar, though less numerous, papillse 

 occur close to the spermathecal pores, and in this case they cover 

 a portion of the skin both anterior and posterior to the orifice of 

 the spermatheca. Here the papillse are more numerous in the 

 case of the posterior spermathecal pores and less numerous 

 around the anterior pair of spermathecal pores. I have dealt 

 with the genital papillse before the other external characters 

 since they are the most obvious of those characters and of 

 themselves serve to distinguish this species from any other. 



The setae of this species form completely closed circles around 

 each segment (except of course, the 1st), without any trace of 

 either a dorsal or a ventral gap. The setae of the anterior seg- 

 ments are not larger than of those which follow ; nor is there any 

 increase in size, or greater crowding together, of the ventrally 

 situated setae. 



The clitellum occupies the whole of segments XIV — XVI and 

 has complete circles of setae upon each of these. The dorsal 

 pores commence in XII/XIII and are not to be seen upon the 

 clitellum. 



The oviducal pore is upon a rhomboid area of which the middle 

 is traversed by the line of setae of segment XIV. The male pores 

 are not very far apart and are separated by 6 or 7 setae. 



The spermathecal pores are 3 pairs on VI/VII — VIII/IX. 



Some of the intersegmental septa are considerably thickened 

 in this species. I recognize 4 septa in front of the gizzard, all 

 of which are rather thick and much interconnected by slips of 

 muscle as is very commonly the case in large earthworms. The 

 gizzard-septa themselves are absent in those septa which should 

 separate segments VIII/IX and IX/X. The following 4 septa 

 are thickened and also much bound to each other by tendinous- 

 looking threads. With reference to the vascular system, I have 

 noticed that the dorsal vessel becomes suddenly much increased 

 in caliber in segment XIII, reckoning from behind forward, the 

 presumed direction of the blood current. The last pair of hearts 

 is in segment XIII ; these hearts, like the 2 preceding pairs are of 

 large caliber, greater than those of the Xth segment. 



The large intestine begins in segment XV and there is a pair 

 of caeca extending through 3 segments. 



