212 Records of the Indian Museum. [Vol. VI, 



and was much less sharply marked off from the basal portion 

 of the prostomium, of which it is an extension. There were 

 no eyes. The segments numbered 36, plus an undifferentiated 

 posterior region. 



The dorsal setae, 2 — 5 per bundle, begin in segment ii; they 

 are all hair-setae, and are not specially elongated in any particular 

 segment. When, as often, they are 3 or 4 per bundle, all are of 

 approximately equal length ; in a bundle of 5 setae, three were 

 longer than the rest (540 [x — between two and three times the 

 diameter of the body), one was somewhat shorter (360 /;), and one 

 much shorter still (less than 180 /^). These setae show the fine 

 serrations noticed by previous observers; on the longer hairs the 

 serrations are about 5 i> apart, or 6 /x towards the base; on a 

 smaller hair they are rather closer — about 4 /x apart; they fade 

 away altogether near the insertion of the setae into the body-wall ; 

 they are present on the setae of segments ii and iii as well as 

 in all the other segments. 



The ventral setae were 3 per bundle in segment ii, 4 and 5 on 

 each side respectively in iii, 4 and 6 in iv, 6 in v; while in 

 the middle part of the body 9 setae per bundle was not uncommon ; 

 the number per bundle increases therefore on passing from the 

 anterior end towards the middle region of the body. The variations 

 in the thickness of the shaft of the setae in the anterior segments 

 were similar to those recorded by Michaelsen {loc. cit.)\ in seg- 

 ment ii the thickness was 3 /- , in iii 2*5 ^ and in iv less than 2 /.. 



Septal glands were present in segments iii , iv and v ; the 

 round stomach occupies viii ; the alimentary canal narrows again 

 behind the stomach, and dilates finally to become the intestine 

 in X. The first nephridium was in ix. 



As to the process of asexual reproduction, w = 16 ; of the 

 segments produced in the zone of budding, the seven posterior 

 ones are placed behind the plane where division will take place, 

 and go to form the anterior end of B. The next zone of budding 

 to be produced appears behind segment xv, i.e., one original seg- 

 ment in front of the first ; so that the animal which will ultimately 

 be separated from this region contains only one of the original seg- 

 ments of the parent. The third zone of budding was being 

 established after segment xxix of the original animal; thus, in 

 B, w = 29 minus 16 (segments in front of the first zone of budding) 

 plus 7 (segments added to form the head of B) = 20. 



Aulophorus tonkinensis (Vejd.). 



This interesting form, first described by Vejdovsky from 

 a single incomplete specimen, has since been more thoroughly 

 investigated by Michaelsen. The latter author's last reference to 

 it {Mem. Ind. Mus., vol. i, No. 3, p. 132, where the previous 

 literature is given) records that it was collected by Annandale in 

 several localities in India, and gives a note b}^ Annandale on the 

 habits of the living worm. 



