1921.] J. Stephenson: Indian Oligochaeta. 755 



Fam. MONILIGASTRIDAE. 



Gen. Drawida, Mich. 



Drawida raui, sp. nov. 



(PI. XXVIII, fig. 7). 



Forests of Sliemoga and Kadui- Districts, Mysore, S. India i\la\', 1920. 

 A. Subba Ran. Several specimens. 



External Characters. — lyength 45 mm. Diameter i"75 mm. 

 Colour dark bluish grey to olive, somewhat lighter ventrally. 

 Segments ca. 159. Anterior end of the body rather bulbous. 



Prostomium prolobous. 



No dorsal pores. 



Setae closely paired, beginning in ii ; remarkably large and 

 prominent for so small a worm, especially in the ventral bundles 

 of segments iii-xii. In the pregenital segments aa is rather 

 greater than be, or may be about equal to it ; in the middle of 

 the body aa^bc ; dd is equal to half the circumference. 



The clitellum was not present. 



Over the ventral surface of segment xi, extending to its poste- 

 rior limit, and encroaching anteriorly on the hinder end of x, is 

 a thickened patch, with a definite and slightly swollen margin, 

 rather rectangular in shape with rounded ends. It extends later- 

 ally on each side to not far from the line of seta c, and is thus 

 broad from side to side and narrow antero-posteriorly. The male 

 apertures are situated on small papillae in the antero-lateral cor- 

 ners of the patch, and are thus over the situation of furrow 

 lo/ii and midway between b and c, rather nearer b (fig. 7). 



Over furrow 9/10, and taking up the posterior third of segment 

 ix and the anterior third of x, are a pair of transversely oval 

 papillae, narrower at their internal ends and slightly sunk in their 

 centres, while the peripherj- of each is swollen and definitely 

 marked. Each extends from a point between b and e but rather 

 nearer h, to not far from the middle line (fig. 7). 



Neither the female nor the spermathecal apertures were 

 visible externally ; from internal dissection the latter open in the 

 line of setae ab in groove 7/8. 



Internal Anatomy. — Septum 5/6 is thin ; 6/7, 7/8 and 8/9 are 

 considerably thickened ; 9/10 is somewhat strengthened; lo/ii 

 11/12 and perhaps 12/13 slightly so. 



There are two gizzards, in segments xiii and xiv. 



Some of the nephridiopores are in cd, but I think not all. 



The testis sacs are large, extending into both segments ix 

 and X, — equally into both, or with the larger part in ix ; they are 

 not constricted by the septum. The vas deferens, narrow and 

 coiled, lies on both sides of septum 9/10. The prostates are 

 elongated, somewhat cylindrical or pear shaped, rather narrowed 

 towards their insertion in the body-wall. There is no distinct 

 duct ; the vas deferens, joining the gland below, can be seen 

 running up its surface towards the free upper end. The surface of 

 the glands is soft, and minutely papillated. 



