OLIGOCH^TA. 261 



Drawida annandalei, sp. nov. 

 (Plate I., Fig. 7.) 

 A single specimen. 



Tan j ore, South India ; from the river Caveri, in the mud below 

 the water ; October, 1911. 



External Characters. — Length 36 mm. ; width, max. 1-75 mm. ; 

 Colour olive. Segments 137. 



Prostomium prolobous. 



Clitellum 2/3 X.-2/3 XIII. = approximately 3 1/3, but not well 

 marked. 



Hale and female pores, and spermathecal apertures, not seen 

 externallj^ 



A genital area is present on segments X. and XI. This is a sUghtly 

 darker oval patch, with its longer diameter transverse, along the 

 line of furrow 10/11 ; the patch lies between the ventral setse of X. 

 and those of XI. ; within it, a smaller oval area is marked out by a 

 shght ridge, as shown in the figure (fig. 7). 



The setse are closely paired. The interval aa is less than be ; and 

 dd is equal to about half the circumference. 



Internal Anatomy. — Septa 5/Q-8/d are much thickened. 



The pharynx exhibits a dorsal pouch, which, according to the 

 evidence of sections, opens into the pharynx by a narrow longi- 

 tudinal slit, while expanding laterally in the pharyngeal wall above 

 this. Three gizzards are present in segments XII., XIII., and XIV. 



Hearts are present in segments VI.-IX. 



Male Organs. — The large testicular vesicles are suspended by 

 septum 9/10, and project forwards into IX. and backwards into X. 

 The funnel is a part of the wall of the sac , the mouth of the funnel 

 being but little dilated, and situated at about the level of the 

 septum (9/10). From this the vas deferens proceeds ; this is a coiled 

 tube, situated in segments IX. and X., penetrating the prostatic 

 cells to open into the inner (proximal) end of the atrium. The 

 atrium of the one side is a tube, vertically placed in segment X., 

 lined with high columnar epithehum, outside which is a muscular 

 layer ; outside the muscular layer again is a thick covering of 

 prostatic gland cells ; the whole organ (atrium -f prostatic invest- 

 ment) is somewhat longer in the vertical direction than it is thick ; 

 it occupies the segment from the dorsal body-wall above to the 

 ventral below ; ventrally the lumen penetrates the body-wall to 

 open at the male aperture in furrow 10/11, in the line of the ventral 

 setse. There is no copulatory pouch. 



On the other side of the body the atrium with its glandular 

 investment is pressed down, in the sections, against the ventral 

 body-wall, in such a way that the vas deferens enters it anteriorly. 



Female Organs. — The ovary is in segment XI., as is also the 

 funnel; the female aperture is in furrow 11/12. The large ovisacs 



