236 Memoirs of the Indian Museum. [Vol. VII, 



ness at the middle. The shaft is rather bowed, and slightly undulating towards the 

 tip ; it tapers very gradually, and the tip is simply pointed ; there is no ornamenta- 

 tion (fig. 40). 



There are no copulatory setae in the spermathecal region. 



Octochaetus pallidus, sp. no v. 



Plate XI, figs. 41, 42. 



Panchgani, W. Ghats, 12 miles from Mahableshwar ; alt. 4,000 ft. 5-vii-1917. B. Prashad. 

 Two specimens, one damaged in the clitellar region. 



Mahableshwar, W. Ghats, 5,000 ft. 5-vii-1917. B. Prashad. A single mature specimen. 



External Characters : — Length 40-44 mm.; diameter 2*5 mm. Colour pale yel- 

 lowish, quite unpigmented, no difference between dorsal and ventral surfaces. Seg- 

 ments 166 ; segments vi-ix indistinctly triannular, — -indeed this secondary annulation 

 extends faintly as far back as the clitellum. 



The prostomium differs in the two specimens from Panchgani ; in the first it is 

 prolobous, in the second somewhat epilobous, with a very broad angle behind, which 

 is continued back by a median groove through segment i. 



Dorsal pores from furrow 10/11 ; the first is small. 



The setal relations may be expressed as follows : — In front of the spermathecae 

 ab = \ aa = half be = § cd ; behind the genital segments ab = \ aa = \ be = half cd ; 

 at the middle of the body ab = -f aa = nearly half be = f cd ; dd is equal to half the 

 circumference or rather less at the middle of the body, but at the hinder end is only 

 about one-third of the circumference. 



The clitellum is saddle-shaped, and extends over xiii-xvii (=5). 



The male field is represented in the undamaged Panchgani specimen by a thicken- 

 ing on the ventral surface of segments xvii-xix, which extends outwards to a little 

 beyond the lines of setae b. The prostatic pores are in the line b, and the seminal 

 grooves lie just outside this line, straight and longitudinal in direction, curving inwards 

 at their extremities to end at the pores ; the grooves are close to the edge of the 

 whitish area. 



In the specimen from Mahableshwar the field was rather more extensive, and 

 circular in shape, it embraced portions of segments xvi and xx, and reached outwards 

 to c. The prostatic pores were situated each in a small transverse groove. 



The female pores are paired, on minute papillae a little internal to and in front 

 of the site of setae a. 



The spermathecal pores are two pairs, at the site of setae a on segments viii and 

 ix ; they are represented by small round papillae, white at their summits, but 

 definite apertures were not present. 



Internal Anatomy : — Septum 4/5 is thin, 5/6 and 6/7 very slightly strengthened, 

 7/8-11/12 all somewhat thickened, 12/13 on ly vei T slightly so; the rest are thin. 



The gizzard is barrel-shaped, in segment vi ; the oesophagus is distinctly streng- 

 thened in segment v also, where shining longitudinal muscular bands are seen. This 

 seems to be the beginning of a double gizzard, such as is seen in Eudichog aster, 



