igry.] J. Stephenson : Indian Oligochaeta. 387 



anterior faces ; 7/8 is thin. No more septa are to be distinctly 

 recognized till 11/12, which is thin, as are all the rest. Septum 

 lo/ii is probably represented by a thin membrane which covers 

 the anterior seminal vesicle ; this can be stripped forwards off the 

 vesicle, by which it is much bulged forwards, and seen to get an 

 attachment to the body-wall. 



The alimentary tube is much bent on itself in segment v ; in 

 vi it is thin-walled and dilated. The gizzard is situated behind 

 septum 7/8, and is large, firm, and squarish. The intestine begins 

 in segment xv. A pair of simple conical diverticula arise in seg- 

 ment xxvii (probably, but the septa are very indistinct). The 

 typhlosole begins at the level of the caeca ; it consists of a vertical 

 lamina, the sides of which are folded into a series of vertical ridges. 

 Paired lymph-glands are situated on the intestine. 



The last heart is in segment xiii. 



The excretory system is micronephridial. 



Testis-sacs contain the testes and funnels ; the sacs are two 

 pairs, those of a pair being quite separate, but those of the same 

 side appear to communicate ; the anterior is also connected with 

 the anterior, the posterior with the posterior seminal vesicle. 

 Both pairs of vesicles are very conspicuous, large and white ; the 

 anterior, which probably belongs to segment x, extends forwards 

 to impinge on the hinder end of the gizzard; the posterior, in seg- 

 ment xii, extends backwards carrying before it septa 12/13, 13/14, 

 and also to some extent 14/15. The posterior is of simple form, 

 while the front margin of the anterior is slightly lobed. 



The prostates take up segments xvii to xx ; they are deeply 

 indented into lobes, and in the normal position almost meet dor- 

 sally over the intestine. The shining and muscular duct is coiled 

 circularly ; it is of moderate stoutness, except at its ectal end, 

 where it narrows, and then joins a copulatory pouch ; the whole, — 

 duct and pouch, — are contained in a membranous (probably mus- 

 cular) sac, through which the duct can be seen, but which has to 

 be torn through before it can be properly displayed. Duct, pouch, 

 and sac form a large flat elevation on the body-wall, which im- 

 pinges upon and rather bulges forwards and backwards the septa 

 limiting segment xviii in front and behind. 



The ovaries have the usual situation. 



The spermathecae (fig. 11) are four pairs. The ampulla is 

 irregular or of an elongated triangular shape ; the stout duct, long 

 and bent on itself, is nearly twice the length and half the thickness 

 of the ampulla. The single diverticulum is a small ovoid irides- 

 cent sac attached by a thin wavy stalk to the duct at its extreme 

 upper end, just below its junction with the ampulla. The loop 

 formed by the duct is bound together by connective tissue, which 

 has to be torn through before the various parts of the apparatus 

 can be nicely laid bare. 



Corresponding to the external papillae there -is seen on the 

 inner surface of the body- wall, on both sides of the ventral nerve 

 cord, and between and behind the copulatory sacs, a group of 



