igiy-] J- Stephenson : Indian OUgochaeta. 365 



There are three large, hard, subspherical gizzards in segments 

 XV, xvi, and xvii respectively ; the softer zones between them are 

 little marked, a gizzard taking up a whole segment. In xiv is a 

 much smaller gizzard, softer than the others, and narrower from side 

 to side, — in other words the alimentarj^ canal is not as broad here 

 as it becomes in the next segment. In a specimen of the second 

 batch which was dissected, there were four gizzards, in xiii-xvi, the 

 first rather smaller. 



The testis-sacs are attached to septum 9/10 in such a way that 

 the larger part of the sac depends into segment x. A considerable 

 portion however projects forwards into ix on the right side, though 

 only a very small part does so on the left. The septum causes no 

 constriction of the sac. The testis appears to be a diffuse pro- 

 liferation of the inner wall of the sac. The vas deferens is a 

 fine, much coiled tube on septum 9/10; the terminal portion is 

 rather broader, and joins the prostate at its anterior and inner 

 side. 



The prostate is of moderate size, sessile on the bodj^-wall, hemi- 

 ovoidal in shape, with its transverse diameter greater than the 

 anteio-posterior ; its surface is soft and yellowish, not smooth and 

 shining. 



There is no ovarian chamber, or in other words segment xi is 

 opened into on opening the worm in the ordinary dissection, 

 and masses of eggs fall out. The ovary is bushy, on septum 

 lo/ii. The funnel is a groove between two lips or ridges which 

 curl upwards and inwards from below on septum 11/12. The 

 ovisacs, large and ovoid, are contained in segment xiv, but a 

 neck passes forwards to connect them with septum 11/12. 



The spermathecal ampullae are large, and meet in the middle 

 line, thus covering the rest of the contents of the segment; in 

 shape the3^ are irregular, and in the dissected specimen were filled 

 with a shining white opaque mass, doubtless spermatozoa. The 

 duct is considerably- coiled, and passes down on the posterior 

 face of septum yjQ ; its first part is narrower than the rest ; it 

 joins the atrium without piercing the septum. The atrium is a 

 cushion-like swelling, several times as thick as the end of the duct, 

 which joins it in the centre of its upper surface ; it is partly 

 embedded in the body-wall, and projects slightly into segment 

 viii; the septum can be separated forwards from over it, so that 

 no part of the atrium is in segment vii, the septum being at- 

 tached to the parietes in front of it. When opened, the atrium is 

 found to be a hollow chamber. 



Remarks. — This species is perhaps related to D.barwelli) but 

 the latter has dorsal pores, no egg3acs(?), no distinct sperma- 

 thecal atrium, and pear-shaped prostates From the pellucidus 

 group the present form is distinguished by the character of the 

 surface of the prostate. 



Special genital marks are not common in the Moniligastridae ; 

 the "glandular" areas on segment xi are therefore of value for 

 identification. 



