232 Memoirs of the Indian Museum. [Vol. VII, 



The ventral surfaces of segments viii and ix are thickened, as in the typical form ; 

 these thickenings show each a pair of shallow depressions, approximately in the situa- 

 tion of the ventral pairs of setae (which however are not to be seen), and connected 

 each with its fellow across the middle line by an irregular shallow trench. The sper- 

 mathecal pores are in the depressed areas, rather in front of the middle of the seg- 

 ment, in the line of setae a, or between a and b. 



Internal Anatomy : — Septum 4/5 is moderately thick ; the next is 7/8, which is 

 somewhat thickened, as are all as far backwards as 13/14. The thickest of the series 

 are 10/11 and 11/12 ; the thickening decreases by degrees in front and behind these ; 

 there is some slight thickening even as far back as 16/17. 



The gizzard is large and ovoid, occupying part of the space between septa 4/5 and 

 y/8. There is one pair of calciferous glands, in segment xv, with lobed outer margins. 

 The intestine begins in xviii. 



The last heart is in xii. 



The micronephridia are small, numerous, and scattered irregularly. 



Testes and funnels are free in segments x and xi ; these segments are filled out by 

 masses of flocculent matter. The seminal vesicles, in ix and xii, are small. 



The prostates are much coiled, in xvii and xix ; the relatively short duct is thin- 

 ner than the glandular part, and passes inwards with an irregular bend at its begin- 

 ning. A number of muscular bands, similar to those described by Michaelsen in 0. 

 surensis (4), are sufficiently prominent to attract attention. 



The spermathecae are so exactly similar to those of the previously described 

 specimen from Poona that no further account is necessary. 



The penial setae, 'J mm. long, 18/* thick in the middle and 20/* at the proximal 

 end, resemble very closely the second shape found in the type form ; the number of 

 rings of spines is about a dozen. 



The copulatory setae are "52 mm. long, and 20M thick in the middle. They have 

 the same bluntly pointed, slightly swollen and claw-shaped tip as the typical form. 

 The convex and concave borders, of the distal third of the shaft are furnished with 

 thin serrated ridges (fig. 35), somewhat as if the spines of the typical form were bound 

 to the shaft each by a delicate web. In addition, on the face of the seta which is 

 presented to the observer under the microscope, a series of semicircular markings is 

 seen ; but I am not quite clear what these actually represent. 



In one, but only one, of the numerous specimens from the garden, an additional 

 marking was present. This was a large slightly hollowed transverse papilla on the 

 posterior half of segment xx and anterior half of xxi, extending from between a and b 

 on one side to a corresponding point on the other, and joining the thickening of the 

 male field along its anterior border (compare the specimen of the typical form from 

 Poona). 



Remarks : — The species is a very variable one, — in the characters of the pro- 

 stomium, the external genital markings, the spermathecae, the penial and copulatory 

 setae. Thus there are three well-marked kinds of spermathecal diverticulum, — simple 



