402 Records of the Indian Museum. [Voi,. VIII, 



No prostotnium was visible. Segments i-iii consist of a single 

 aunulus ; iv-v are biannulate, with the setae on the anterior annu- 

 lus; vi is triannulate, the setae on the middle one; vii-viii have 

 four annuli, the setae on the second; ix has three principal annuli, 

 each slightly subdivided into two ; the remainder are funda- 

 mentally triannulate, the posterior annulus being sub-divided in 

 the segments in front of the clitellum, but not in those behind it 

 The first dorsal pore is in furrow \\. 



The setae are paired, but not very closely. In general they 

 are larger in the anterior part of the body than in the posterior, 

 but they become progressively smaller from segment vii forwards, 

 and no ventral setae could be seen in the first four segments. In 

 front of the clitellum aa^=2ah, on the clitellum --= 2^fl6, poste- 

 riorly = 3^6 (just behind the clitellum however -= 4^^) ; cd is 

 rather greater than ab ; aa is rather greater than he ; dd is more 

 than half the circumference. 



The clitellum extends over i xiii-xvii =^ 4^, and includes the 

 whole circumference. Its dorsal surface is marked out by a series 

 of parallel oblique lines into a number of rectangular areas. 

 Grooves and annuli are obliterated ^ except towards its posterior 

 limits ; setae are present, and also the dorsal pores ; the latter 

 however are indistinct. 



The male apertures are a pair of deep pits on segment xvii, 

 the centre of the pit in line of setae h, the inner margin of the pit 

 in a. Deeply within the pit can be seen an upwardly (in this posi- 

 tion) directed tube, with an aperture at its summit from which 

 project one or two genital setae; the tube and its aperture are 

 compressed antero-posteriorly, and thus have their greatest dia- 

 meter in the transverse plane. Between the two pits, on the 

 ventral surface of segment xvii, are a few transverse groovings. 



The spermathecal apertures are one pair, conspicuous, in 

 furrow i , the centre of the aperture is outside the line h, but not 

 half-way between b and c (nearly as far beyond h on the outside 

 as a is on the inside). 



For a dozen segments or so behind the male apertures the 

 ventral surface is flattened, and in the anterior part of this region 

 depressed, so as to form a wide ventral groove between the ven- 

 tral setal bundles. Lying within the margins of this depressed 

 region, in furrow ||, are a pair of horseshoe-shaped depressions, 

 their outer margins convex outwards ; the inner, open portion of 

 the horseshoe is prolonged inwards to meet its fellow in the 

 middle line, and a dumbbell-shaped area is thus produced, 

 shallow in the middle, deeper at its extremities; the lateral limits 

 of the area are between the lines a and h ; antero-posteriorly it 

 takes up about half the posterior annulus of xxii and half the 

 anterior annulus of xxiii (fig. 18). There is a similar horseshoe- 

 shaped depression in furrow li, but on the left side only. 



Septum =r is thick, il is very thick, produced backwards as a 

 much elongated muscular cone, so that its insertion into the 

 alimentary tube is far posterior to its parietal attachment. Septa 



