L920.] J. Stephenson: Oligochaeta from India and E. Persia. 235 



Prostomrum epilobous f , the tongue separated from the projecting lobe in front, 

 but not delimited behind. 



Dorsal pores begin from furrow io/ii. 



The setal relations may be expressed as follows : — On segment vii ab = \aa = half 

 be = fed ; behind the clitellum ab = \aa = pc = half cd ; in the middle of the body ab 

 = ±aa = jbc — jcd ; dd = almost § of the circumference. 



The saddle-shaped clitellum takes up nearly eight segments, from near the anter- 

 ior border of xii to xix inclusive. 



The male field is a rectangular whitened area which includes the ventral surfaces 

 of segments xvii-xix, and extends laterally to just outside the lines of setae b. The 

 seminal grooves run longitudinally in line with setae a ; the prostatic apertures, at 

 the ends of the grooves, are not separately visible ; the intersegmental furrows are 

 visible, intersecting the seminal grooves at right angles. 



An elongated, transversely oval genital papilla is present behind the male area, 

 over the situation of furrow 21/22, depressed in its centre, where it covers the anterior 

 half of xxii and the posterior of xxi ; laterally it reaches on each side to the line of 

 setae b, 



Segment xiv presents a whitish pad mid-ventrally, on which the female pores 

 are perhaps represented by a couple of darkish dots at about the middle of the length 

 of the segment. 



The spermathecal apertures seem to be in furrows j/8 and 8/9, as a couple of 

 whitish dots in line with a. 



Internal Anatomy : — -Septum 4/5 is moderately stout ; 5/6 to 7/8 are very thin ; 

 8/9 is somewhat thickened, 9/10 to 11/12 moderately so, 12/13 very slightly so. 



The gizzard is in segment vi, of moderate size, squarish. The calciferous glands 

 are two pairs, in segments xv and xvi, ovoid, antero-posteriorly compressed, and situ- 

 ated dorsally on the alimentary canal by the side of the dorsal vessel. The intestine 

 begins in xvii. 



The last heart is in xii. 



The excretory system consists of scattered micronephridia. 



Testes and funnels are free in segments x and xi. Two pairs of large seminal 

 vesicles occupy ix and xii, those in xii meeting dorsally above the alimentary canal ; 

 both pairs are much lobulated, — indeed they might be described as racemose. 



The prostates are two pairs, rather small. The glandular part is a rather thick 

 opaque tube, with a few undulations but generally transverse in direction ; the duct 

 is very small, short and thin, also transverse in direction. 



The large ovaries have the usual situation. 



The spermathecal ampulla is an irregular sac ; its duct is large, stout at its begin- 

 ning and narrowing towards its ectal end, as long as the ampulla and fully half as 

 thick in its ental portion. There is a single diverticulum, which arises from the 

 duct at or above the middle of its length ; it is finger-shaped on the whole, slightly 

 swollen at its blind end, where a few seminal chambers are indistinctly seen (fig. 39). 



The penial setae are in length up to i - 5 mm., but very thin, — only 6/* in thick- 



