756 Records of the Indian Museum. [Yoi,. XXII, 



A second pair of prostates occurs in segment, ix, of the same 

 size, shape and appearance as the former in x. They are inserted 

 into the body-wall near or in the situation of furrow 9/10, between 

 the lines of setae b and c, though nearer, almost in b. 



The ovaries are in segment xi ; the septa here are quite normal, 

 and there is no ovarian chamber , as occurs 'n so many species. 

 The ovisacs extend back to segment xv; thej- are tabular as they 

 pass through segments xii , xiii and xiv, and swollen in xv : or the}' 

 maybe moniliform, constricted by the septa. 



The sperraa thecal ampullae are small and spherical, in segment 

 viii ; the duct is narrow and coiled, lying on the posterior face of 

 septum 7/8. The atrium is a relatively large ovoid structure in vii, 

 the duct entering near its base ; it pierces the body-wall in the 

 line ab. 



Remarks. — The well-developed second pair of prostates, and 

 the genital markings, are characteristic, and serve at once to dis- 

 tinguish the present species. 



Fam. MEGASCOLECIDAE. 



Subfam. MEGASCOLECINAE. 



Gen. Plutellus, E. Perrier. 



Plutellus aquatilis, sp. nov. 



(PI. XXVIII, fig. 8). 



Small stream below Kotagiri, Nilgiris ; ca. 5700 ft. X. .^nnsiidale and 

 R. B. S. Sewell. A single specimen, broken into two. 



External Characters. — Length of both pieces together 115 mm. 

 Diameter 175 mm., near anterior end 2 mm. ; a long thin worm. 

 Unpigmented, colour grey, due to the intestinal contents ; at 

 anterior end quite pale. Segments 162 ; segment iv biannular, 

 v-viii triannular, the rest simple. 



Prostomium small, proepilobous. 



Dorsal pores are present from furrow 8/9. 



The setae are paired ; in the middle of the body ab^ 2/5 aa= 

 1/2 he = 2/3 cd ; behind the genital region ab =1/3 aa = 2/5 be = 

 1/2 cd ; in front of the genital region ab = 2/5 aa = 1/2 be = 1/2 cd 

 {i.e. the lateral setae are not paired in front of the genital region) ; 

 dd is less than half, and in the middle of the body is only one-third 

 of the circumference, the setae d being above the lateral line of tlie 

 body. 



No clitellum was visible. 



The male pores are on segment xviii, on small papillae which 

 take up the interval between the lines of setae a and b ; these 

 papillae are connected across the middle line by a transverse ridge. 



The female and spermathecal pores were not visible external- 

 ly ; from internal dissection the latter are found to open at the 

 middle of the length of segments viii and ix, in the setal zone, and 

 rather outside the line b. 



