1920.] J. Stephenson: öligocHaeta from India and E. Persia. 251 



Dorsal pores from furrow 11/12 or 12/13. 



The setal intervals vary somewhat ; ab may be anything from \ to \ of aa, 

 and over the greater part of the body=about f be and \cd: in front of the male 

 apertures be becomes rather smaller, and cd increases ; the interval ab is smallest im- 

 mediately behind the male field. The mid-dorsal interval dd is about f of the 

 circumference. Towards the anterior end the setae are difficult to see. 



I never saw a distinguishable clitellum. 



The appearances of the male field are also not very definite, but such as they are, 

 they are pretty constant. The chief feature is the existence on each of the segments 

 xvii and xix of a pair of ill-defined papillae, perhaps better described as whitish thicken- 

 ings of the body- wall ; these are generally transverse in direction, and have their cen- 

 tres somewhere near the line b, extending inwards and outwards to a variable ex- 

 tent ; their limits are rather indistinct. On segment xviii there is usually a similar 

 thickening which unites the outer parts of the thickenings on xvii and xix, thus mak- 

 ing a crescentic swelling with its concavity inwards on each side (fig, 54a). 



The prostatic pores are in or just internal to the line of setae b, on segments xvii 

 and xix ; the seminal grooves bend inwards slightly at the middle of their length, some- 

 what as in E. ashworthi. T saw the pores of the vasa deferentia in one specimen, on 

 xviii in b, at the apex of the inward bend in the course of the seminal grooves ; their 

 anterior and posterior lips were slightly tumid. 



The female pore or pores are perhaps contained within a minute white spot mid- 

 ventral and anteriorly situated on xiv. 



There are small transversely elongated white cushions on segments viii and ix, 

 in the position of the ventral setal bundle. From internal dissection the sperma- 

 thecae appear to discharge between the sites of setae a and b on these segments. 



Internal Anatomy : — Septum 4/5 is thin ; 5/6 to 9/10 are moderately strengthened, 

 10/11 slightly so, n/12 still less, and the rest are thin. 



The gizzards, large, rounded, and firm, are in segments v and vi ; they are 

 separated by a soft-walled part of the oesophagus in the anterior part of segment vi. 

 The calciferous glands, in segments xi and xii, are shortly ovoid, and joined to the 

 gut by a short stalk on the inner side. The intestine begins in xv. 



The last heart is in segment xii. 



Behind the genital region the micronephridia are in a transverse row on each 

 side of each segment, and so arranged that the corresponding organs follow behind 

 each other in longitudinal rows ; of these there are about five on each side of the 

 body. Towards the hinder end of the body the innermost nephridium of each trans- 

 verse row on each side, — that by the side of the ventral nerve cord, — increases in size 

 and thickness, and though still small is much the most conspicuous ; the others of the 

 row become individually smaller and increase in number, and lose the regularity of 

 the arrangement in longitudinal rows. 



Testes and funnels are free in segments x and xi ; those in the two segments are 

 equal in size. Seminal vesicles are present in segments ix and xii ; in one specimen 



