BY J. J. FLETCHER. 605 



of tlie two outer pairs further apart (about twice) than those of 

 the inner pairs ; the first row on each side about 3 mm. from the 

 median ventral line, the second about 1 mm. from the first, the 

 third about 3 mm. from the second, the fourth about 2 mm. from 

 the third. The setae are easily seen with a lens, and are usually 

 plainly visible to the naked eye. 



Male pores two, on xviii on slight papillte about 9 mm. apart and 

 about in line with the second setse. The two oviduct pores 

 are on xiv, leather close together, (3 mm. apart), in front but consi- 

 derably ventrad of the inner rows of setse. Spermathecal pores 

 two pairs, ventral in position, between vii and viii, and viii and 

 IX but just on the posterior margins of vii and viii, about 7 mm. 

 apart, and just dorsad of the second row of set?e on each side. 



Dorsal pores commence between about xix and xx ; the first two 

 or three less distinct than the others and sometimes hardly notice- 

 able; nephridiopores not discernible. 



Alimentary canal : the very muscular pharynx occupies the first 

 four segments and has immediately behind it the first complete 

 mesentery ; the very short cesophagus and the gizzard are in seg- 

 ment y ; in segments xii-xviii the lumen of the canal is dilated 

 and its walls are very vascular, but there are no diverticula ; the 

 large intestine commences in xix. 



Genitalia : true testes two pairs, in segments x and xi, small 

 filamentous cellular masses attached low down to the posterior 

 faces of the mesenteries between segments ix-x and x-xi and 

 corresponding in position with the ovaries in xiil ; opposite the 

 testes, and therefore in segments x and xi, but quite free and 

 independent of them in both the specimens dissected (in which 

 evidently the breeding functions were in abeyance) are the two 

 pairs of ciliated rosettes lying immediately in front of the posterior 

 mesenteries of the segments which contain them ; in segments xii 

 and XIII (not the antei'ior pair in ix or xi as usual) two pairs of 

 racemose vesiculse seminales, membranous sacs containing sperma- 

 tozoa in various stages of development, attached to the antei'ior 

 mesenteries of the segments on each side of the intestine, (a third 

 pair of somewhat similar-looking but very much smaller bodies in 



