igai.] J. Stephenson: I ndian Olis.ochaeta. 749 



actually holandric, and is to be looked on as the most primitive 

 member of the familj'. 



Drawina raui may thus be regarded as the most primitive 

 existing member of the genus, at any rate in respect of its male 

 reproductive apparatus. There are other primitive features 

 also: — (i) In a considerable number of species of the genus seg- 

 ment xi, which lodges the ovaries and female funnels, forms an 

 " ovarian chamber," being shut out from the body-wall by the 

 meeting and coalescence of the septa which bound it ; in the pre- 

 sent species however, as in some others, the septa have the usual 

 arrangement, and there is no ovarian chamber. (2) In many 

 species of the genus the setae are remarkably small, and in some 

 may even be absent or unrecognizable in the most anterior seg- 

 ments ; here however the setae are remarkably large for so small a 

 worm. (3) The fact that the spermathecnl atrium is large and 

 sai.-like maj' not improbabh' be another primitive feature ; in this 

 case the numerous species in which it is small, almost or entirely 

 hidden in the body-wall, or even absent, would represent a second- 

 ary condition. 



A specimen of Braiichiodrilus (interesting, like Brauchtura, 

 from the possession of gills), the species unfortunately indeter- 

 minable, comes from Burhanpur in the Central Provinces. The 

 genus, so far found onlj- in India, and for long represented only by 

 Bourne's Chaeiobranchiis se/nperi (Madras, 1890), has been in recent 

 years rediscovered in Madras, and occurs also at Lahore and 

 Luck now. 



The new species Plutellus aquatilis, Eutyphoeus iiianipurensis, 

 and Eitdichogaster harkiidcnsis bring about no change in the 

 areas of distribution of these genera as already known. Me- 

 gascolidi'S aiinandalci (Godaveri District, on the E. coast) ex- 

 tends the range of this genus to a region where it had not pre- 

 viously been found ; the genus appears to be widely spread, but 

 nowhere abundant. 



The rediscovery of Bourne's Perionyx saltans after thirt^'-five 

 years, in the Nilgiris, not far from where it was originally found, 

 is interesting. 



Systematic changes adopted in the present paper. 



I have, following Michaelsen, restored the worm which for a 

 long time has been known as Lampito mauritii to the genus Me- 

 gascolex. Michaelsen, who in the Tierreich volume (6) had united 

 Kinberg's genus Lampito with Megascolcx, separated it again in 

 1909 (7), in consequence of finding two other worms which agreed 

 with L. mauritii in the possession of a peculiar form of nephridial 

 system, — micronephridia throughout the body, and meganephridia 

 in addition in the postclitellar segments ; to these three species 

 Stephenson later added two others (13, 14), Michaelsen again 

 fused the two genera in iqi6 (8), since he had come to believe that 

 the coexistence of micro- and meganephridia had no special impor- 



