1 914] J- Stephenson : Oligochaeta. 373 



iridescent, as a flattish bowl-shaped structure, its margin thickened 

 and recurved but not puckered or folded. The vas deferens is 

 long and much coiled ; it passes down the posterior face of the 

 septum, and pierces the body-wall close to the antero-internal 

 margin of the prostate. This latter organ is a hemispherical 

 white mass, sessile on the ventral body- wall of segment x ; it is 

 covered by a peritoneal investment. There was no vestigial 

 prostate in ix. 



The ovaries are comparatively large and folded masses, attached 

 to the anterior septum of segment xi^ and contained in the 

 chamber described above. The egg-sacs open on the posterior 

 wall of the chamber in a funnel-shaped depression with a prominent 

 upper lip ; each extends back through xii and xiii into xiv. 

 There were numerous ova free in the ovarian chamber, adhering 

 to its anterior and posterior walls ; I did not identify the ovarian 

 funnels and oviducts. 



The spermathecae are in segment viii ; each is an ovoid sac, 

 attached to the posterior face of septum I, and situated beneath 

 an arch formed by the curve of the nephridium, which is also 

 attached b}^ a mesentery to the posterior face of the septum. 

 From the lower end of the ampulla a fine white much coiled duct 

 descends to the ventral body-wall ; its terminal portion is directed 

 outwards and pierces the body-wall some distance towards the 

 side ; even when followed into the body-wall it shows no percept- 

 ible thickening or muscular glitter, and it has no appendages. 

 No part of the apparatus gets into segment vii. 



The present species is nearly related to the group of forms 

 which have been subsumed by Michaelsen (4) under D. pelliicida . 

 Besides the slight differences in the position of the genital apertures 

 with regard to the setal lines, and the shape of the testicular sacs, 

 the comparatively large number of gizzards and the presence of 

 genital papillae will serve to distinguish the present form. 



Drawida decourcyi, sp, nov. 



L'pper Rotung, Abor country, all. ca. 2000 ft. ; ii-i-1912 (M. de Coiir- 



cj'). A single specimen. 

 Rcnging, 24-xi-i9ii {F. 11. Stewart). Two specimens, one immature, 



both incomplete posteriorly, and one small fragment. 

 Same place, 25-xi-i9ii {F. H. Ste-wart). A fragment, probably the 



hinder end of an example of this species. 



lyength 7 inches ; greatest diameter 8 mm. ; colour pale green 

 ventially and laterally, a dark bluish green dorsally, except at 

 anterior end where the dorsal surface is pale green, like the 

 ventral. 



Segments 226; those of the middle and posterior parts of 

 the body are very short. The posterior end of the body is as if 

 truncated, not tapering;, the last three segments show on the 

 flat posterior end. Segment v is faintly biannulate ; vi faintly, 

 vii and viii markedly triannulate : ix biannulate, with a very 



