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



already mentioned. They are always longer than the measurement given by Michaelsen 

 (who gives "24 mm.), — usually about *5 mm., and not less than -4 mm. 



The modified setae in the neighbourhood of the male field are not always, accord- 

 ing to my experience, to be found. They are much less modified than those of the 

 spermathecal region, and may even still retain the ordinary double curve with the 

 nodulus ; the sculpturing consists of a number of fine semicircular lines, concave 

 towards the tip of the seta, or of a few faint transverse rows of closely set dots, or 

 of zigzag lines which indent the surface of the seta sufficiently to produce irregu- 

 larity of the margins (fig. 51). 



Eudichogaster bengalensis, Mchlsn. 



Bheraghat, Marble Rocks, 13 miles from Jubbulpore ; Central Provinces. 22-vi-1917. 

 B. Prashad. A single specimen. 



The present species has been described by Michaelsen (4). As this is the second 

 time it has been encountered, a few notes may be added to supplement the original 

 account. 



The prostomium I should describe as proepilobous, with a pair of shallow grooves 

 dorsally on segment i ; the grooves extend back over three-quarters of the segment, 

 but not as far as the intersegmental furrow. 



The first dorsal pore I found in furrow 11/12. 



My specimen showed a series of papillae in the spermathecal region, — three pairs, 

 on segments viii, ix, and x, oval in shape, white, including and extending beyond the 

 setae ab both inwards and outwards. 



The last heart is in segment xii. 



As the nephridial system has been shown by Michaelsen to be of importance in 

 this genus, and as his specimens were considerably softened and so not favourable 

 for examination, I give the results of my own dissection. The individual microne- 

 phridia are large and few ; two longitudinal series are to be seen on each side of the 

 body in and behind the prostatic region ; i.e. there are only two on each side of each 

 segment. At about one-third of the length of the animal from the posterior end 

 the two are still present, and similar in appearance ; though the outer, which extends 

 on the body-wall from the site of seta c to half-way between d and the middorsal 

 line, is larger than the inner, which only takes up a space equal to the interval be. 

 A little behind this the inner becomes more opaque and rather bulkier than before, 

 and so more conspicuous. Towards the hinder end it maintains these characters, and 

 increasing in size also so as to include the interval a to c, it becomes much more con- 

 spicuous than the outer nephridium, which has rather diminished in size. I think there 

 may be a few very minute micronephridia on the body-wall in addition to the series 

 described above, but the condition of the specimen is none too good, though appar- 

 ently better than Michaelsen's. 



The penial setae are not ornamented so markedly as in the type. The spines are 

 extremely fine, and are arranged in short transverse rows ; there is no specially pro- 

 jecting brush-like circle near the tip. 



