STUDIES ON EARTHWORMS. 91 



pores place slightly ventrad of aud anterior to the line of 

 "seta 4" (fig. 23, a), i. e. the lower seta of the lateral couple, 

 as in Urochaeta, Microchseta, &c. These pores do not 

 follow the setge in their alternation, but form a continuous 

 line ; the two male pores were also by dissection found to be 

 situated very far back, viz. in somite xxii. Each is placed a 

 little dorsad of and anterior to the line of "seta 3," which is 

 present on one side of this somite, but absent on the other side 

 (fig. 24, b). The spermathecse open at the posterior edges of 

 somites vi, vii, and viii, in the same line with the nephridio- 

 pores (fig. 23, c). 



Internal Anatomy. — There are five strong infundibuli- 

 form septa behind somites vi to x, hiding the oesophagus and 

 gizzard, such as are seen in Titanus, Anteus, Urochseta, 

 &c. ; the next ten septa behind these are much thinner, and 

 behind somite xx they are exceedingly delicate. The elongated 

 seminal reservoirs are very conspicuous (fig. 26). 



The alimentary tract presents no remarkable points. The 

 (Esophagus occupies somite v and part of somite ri. The 

 gizzard occupies the rest of somite vi. Then follows the tubular 

 intestine, which is very narrow; it passes through the five 

 strong septa, and in somite xi becomes enlarged ; its walls 

 become thin, and are constricted as the tube passes through 

 the septa ; this is the sacculated or typhlosolar intestine. The 

 typhlosole is a simple laterally-compressed fold, carrying the 

 usual blood-vessel. 



There are no glands nor caeca opening into the oesophagus 

 or intestine. 



The only genital organs which I was able to find are a 

 pair of seminal reservoirs with their rosettes and ducts, and 

 three pairs of spermathecse. 



The seminal reservoirs consist of a pair of very long 

 tongue-shaped sacs (as in Titanus and Urochgeta), starting 

 from somite xii, and reaching as far backwards as somite 

 XXXVIII (fig. 26, g). This is a most exceptional length for the 

 seminal reservoir, for in Urochseta the elongated sacs only 

 occupy three somites, and in Titanus fourteen somites. As 



