1 9 17.] J. Stephenson : Indian Oligochaeta. 369 



the same shape and relations as m the last species ; there is no 

 swelling at its base. 



Remarks. —This species is also one of the group which comprises 

 D. travancorensis, D. jalpaigurensis, and the last described form (as 

 well as several which follow), characterized by the elongated pros- 

 tate and much elongated spermathecal atrium. The prostate has 

 the simplest form in D. travancorensis , where it is simply pear-shaped ; 

 but others of the group are apparently less modified as regards the 

 ovarian chamber. 



The relatively narrow interval between the ventral set al bun- 

 dles is rather characteristic of the present species. 



Drawida rangamatiana, sp. nov. 

 (PI. xvi, fig. 3). 



W. 82/1. Rangamati, Chittaoong Hill Tracts, Bengal. i7-vii-i9i5. 

 R. Hodgart. A single specimen. 



External characters. — Length 137 mm. ; maximum breadth 

 75 mm. Nonpigmented, light grey in colour. Segments 237; in 

 the posterior third of the body the segments are very short. 



There is apparently no prostomium. 



Dorsal pores are absent. 



The setae are closely paired. In the anterior segments aa is 

 equal to he, behind the genital region aa is two-thirds of be, but in 

 the middle of the body and towards the hinder end it is distinctly 

 less than half he ; d is in the lateral line of the body, so that dd is 

 half the circumference. All the setae are relatively very small, 

 considering the large size of the worm. 



The nephridiopores are in the line of the lateral setal bundles. 



No clitellum was distinguishable. 



The male apertures are in groove lo/ii, with their centres 

 between h and c, but nearer to c; the borders of these segments 

 are much swollen where they are in relation with the apertures. 



The female apertures are in 11/12, between h a.nd c, but 

 nearer h ; the position is marked on one side by a thickening and 

 whitening of the posterior lip of the groove. 



The spermathecal pores are in 7/8, their centres just below c ; 

 the lips of the groove are swollen here, the swelling of the anterior 

 lip extending upwards beyond d. 



Internal anatomy. — Septa 5/6, 6/7, 7/8, and 8/9 are very stout 

 and strong, especially the first two; 8/9 is the thinnest of the 

 four; the rest are thin. 



The oesophagus, thin-walled and filled with reddish powder, 

 was in the single specimen available bulged alternately on the two 

 sides in successive segments. The gizzards are four in number, 

 in segments xvi to xix, and are separated by softer annuli. 



The last hearts are in segment viii ; there are two commis- 

 sures on each side in this segment. 



The testis-sacs are rather similar to those of D. ghatensis; 

 though to be looked on as derived from septum 9/ro, they occupy 



