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



obvious as a clear glassy layer over proboscis ^ prostomium , 

 and anterior segments, where it was 5 — 6 /i in thickness. 



The dorsal setae, beginning in segment vi, were usually two 

 per bundle^ both hair-setae, but of unequal length. The longer of 

 the two was about 530 /u. in length, or double the diameter 

 of the body ; the shorter was about half the length of the 

 longer. In addition, contained within the setal sacs, and reaching 

 only to the level of the surface of the bod}^ there were one 

 or two fine pointed hair-like setae, 50 fx long, probably of the 

 nature of ' replacing setae.' ^ 



The ventral setae, mostly six or seven in a bundle, but some- 

 times as many as nine, were in length about 130 //. Of the two 

 prongs at the outer end, the distal was very much longer and 

 thicker than the proximal, so that on a superficial examination 

 the setae sometimes appear to end in a single somewhat sharply 

 curved hook; the nodulus was slightly proximal to the middle; 

 and the proximal portion of the shaft was bent at a well-marked 

 angle, instead of showing the usual even curve. These setae there- 

 fore resembled those of the specimen recorded from Lahore, 

 as illustrated in Mem. Ind. Mus., vol. i. No. 3, pi. xix, fig. 47. 



The alimentary tract begins to be covered by chloragogen 

 cells in segment vi. The stomach is a well-marked dilatation 

 beginning in vii, either at the level of the setae, or close behind 

 dissepiment % ; it extends as far as the setae of viii ; its wall 

 is composed of large granular cells. The alimentary tube is 

 agg-in narrowed behind the stomach, dilating finally in x to 

 become the intestine. 



Body-cavity corpuscles were noted in the first (the mutilated 

 living) specimen, as small clear homogeneous spindle-shaped 

 bodies without visible nucleus ; they were not visible in the 

 preserved specimens. 



The position of the first nephridium varied ; in some specimens 

 it was in vii, in about an equal number in viii, and once in 

 ix. In cases where A (the first animal of the chain) had the 

 first nephridium in viii, it was in viii in B also. Since B receives 

 five segments from the budding zone (v. post.), segments vi 

 and vii of B belonged originally to the middle part of the body of 

 the parent or undivided animal, and hence presumably contained 

 nephridia ; the nephridia of these segments must therefore have 

 degenerated, in these cases, at the onset of asexual division. 

 My previous specimen from Lahore had the first nephridmm 

 in ix {loc. cit.). 



The shape of the cerebral ganglion in the preserved specimens 

 is shown in text-fig. 3 ; it is indented anteriorly and posteriorly, 

 and is remarkable in possessmg a pair of large antero-lateral 

 lobes. It thus dift'ers markedly from the Lahore specimen {loc. cit., 

 pi. xix, fig. 48). 



• But see, on the subject of such supposed • replacing setae', Piguet, Rev. 

 Suisse de Zool., T. 141, p. 290 ; and, in regard to another species, Michaelsen, 

 Mem. Ind. Mus , vol. i, No. 3, p. 134. 



