A NEW SPECIES OE MONILIGASTEE EEOM INDIA. 375 



glandular portion being distinctly marked off from the mus- 

 cular duct, whereas in M. indicus no such separation exists. 

 If the bilobed structure of my worm were to be drawn out in 

 such a way as to produce a couple of glands communicating 

 by short ducts with a common duct, much the same arrange- 

 ment would be produced. 



The ovary closely resembles that represented by Kosa for 

 M. Beddardii, and occupies the space between the displaced 

 septum x/xi and that between Somite xi and xii, being there- 

 fore in Somite xi. 



The oviduct is provided with a wide expanded funnel (fig. 

 8), very much as Perrier describes it; it is quite independent 

 of the ovisac — that is, this latter structure opens into the 

 coelom outside the edge of the funnel, and not through it, as 

 in some earthworms. Nor is there any reflected portion of 

 the funnel entering the sac, as I have recently described in 

 Spargauophilus.^ 



The ovisac is not so extensive as it is in several of the 

 species, e.g. in M. minutus, A. G. B., where it traverses 

 Somites xii — xv, but it is readily visible in dissection as a 

 narrow white structure lying in Somite xii, and attached to 

 its anterior septum. 



The worm was not fully mature. I find no spermatozoa in 

 the spermathecse ; those in the sperm-sacs are none of them 

 fully formed, except some attached to the funnel of the duct. 

 At first I took the muscular trabeculse for spermatozoa, but by 

 following their course from section to section I soon ascertained 

 that this was not the case. 



The ova in the ovary are quite small, and there are none 

 in the ovisac. 



I will now pass to the consideration of a few other points in 

 the anatomy of M. indicus. 



The Body-wall. — The usual muscular coats are present, 



but they show a feature which has hitherto not been noticed ; 



the lateral regions both of the circular and the longitudinal 



layers are very much thicker than the dorsal and ventral 



' " A British Aquatic Rhinodrilid," this Journal, November, 1892. 



