1920.] J. Stephenson : Oligochaeta from India and E. Persia. 253 



The clitellum was indistinguishable. 



The male field is represented by a very slight whitening and thickening of the 

 ventral surface of segments xvii to xix. The lateral parts of this area are better 

 marked, and constitute definite ridges, which turning inwards at their anterior and 

 posterior ends enclose the centre of the area as within brackets ; in the longitudinal 

 portion of their course the ridges lie a little outside the line b. 



The seminal grooves are crescentic, the convexity outwards; they begin and end 

 in the position of seta a on xvii and xix, and the prostatic apertures are presumably 

 situated at these points; the grooves by their outward curve just get outside the 

 line of setae b at the middle of their length. 



The female pores were not visible. 



There was nothing to be seen in the spermathecal region. 



Internal Anatomy : — I could not distinguish any septa in front of 6/7, which is 

 thin; 7/8 is thin, 8/9 to 10/11 slightly thickened, the rest thin. 



There are two large gizzards in segments vi and vii. The calciferous glands are 

 three pairs, roundly ovoid masses in segments x, xi, and xii. The intestine begins 

 in xv. 



The last heart is in segment xii. 



Funnels were identified, perhaps somewhat doubtfully, lying free in segments x 

 and xi. The seminal vesicles are two pairs, in ix and xii, yellowish in colour, of moder- 

 ate size, somewhat lobulated and rather granular-looking on the surface. 



The prostates were scarcely developed. 



The spermathecae are two pairs, the ampulla of each a small ovoid sac which nar- 

 rows ectally to become the duct ; the duct may be said to be half as long and half 

 as wide as the ampulla. A simple finger-shaped diverticulum, half as long as the am- 

 pulla, arises from the junction of ampulla and duct. 



The penial setae are characteristic ; their length is 3 mm., their thickness 8-9/. 

 The distal portion shows a gentle sickle-shaped curve, the tip being slightly bent 

 in the opposite direction and bluntly pointed. There may be a constriction where 

 the curved distal meets the straight proximal portion of the shaft. Towards the tip 

 are a number of indentations of the margins, which however do not form spines 

 standing off from the shaft (fig. 55). 



Eudichogaster pusillus, sp. nov. 



Plate XI, figs. 56, 57. 



Saugor, Central Provinces. 20 vi-1917. B. Prashad. A single specimen, damaged some 

 distance behind the clitellum 



External Characters : — Length 28 mm. ; diameter maximum 1-5 mm. Colour grey- 

 ish, not distinctive; clitellum a reddish-brown. Segments ca. no. 

 Prostomium proepilobous. 

 Dorsal pores not seen in front of clitellum. 

 The setal relations are as follows : — In the middle of the body ab = half aa = 



