754 Records of tlie Indian Museu>u. [Vol. XXII, 



(fig. 3) ; the hairs are onh- about half as long again as the needles, 

 and thus are very much shorter than the diameter of the body. 

 In the anterior segments some needles are singly pointed and 

 rather blunt, and others, perhaps the majority, double-pointed 

 with the outer prong much shorter and less conspicuous than the 

 inner. In this anterior region the bundles consist of about seven 

 needles with one, two, or up to four hairs. 



Further Ijack the needle setae of the dorsal bundles are 

 peculiar and characteristic. The distal end becomes flattened and 

 blade-like or oar-like, the tip being usually rounded in outline 

 (fig. 4a) ; occasionally the flattened part retains a trace of the 

 bifid character (fig. 46). These oar-like setae begin in segment 

 xiii in one specimen, in vii in another ; they continue to the hinder 

 end of the body. The number of setae in a bundle in the hinder 

 part of the bod}' i? usually 5 needles with two or three hairs. 

 The length of the needles in the anterior segments is from 74M to 

 a maximum of 98/= ; and posteriorly about 60/'. 



Some of the needles in the posterior dorsal bundles seem to 

 be of the single-pointed type, but I think this is only the appear- 

 ance of the flat blade seen edgewise. Indeed I am not absolutely 

 confident that any are truly singly pointed even in the anterior 

 dorsal bundles; in one specimen, mounted in glycerin and 

 therefore showing details of setae more easily than the balsam 

 preparations, I was unable to convince myself v>'ith the oil inimei- 

 sion lens that any of the dorsal setae which were in a favourable 

 position for examination were certainlj^ singly pointed. 



The ventral setae are singly or doubly pointed needles, the 

 bundles consisting of as marry as nine in the anterior, and six or 

 seven in the posterior region. In length they are about 86/^ in 

 the anterior, and 51/' in the posterior segments. Some setae in 

 segments ii, iii and iv are singly' pointed; with this exception all 

 have a slight second outer prong (fig. 5); one, in an anterior 

 segment, appeared to have two small outer prongs (fig. 6). 



The pharynx extends back to the hinder end of segment iii ; 

 the oesophagus is narrow, and occupies segments iv to vii ; then 

 a sudden dilatation occurs, and thenceforward the tube is wide 

 and occupies most of the available space in the .segments. A pair 

 of hearts are present in segment vi. The dorsal vessel is ventral 

 in position, lying to the left side of the ventral vessel throughout 

 most of the body ; at the anterior limit of segment vii it mounts 

 dorsalward, and becomes dorsal in vi. There are large parietal 

 vessels, in complicated loops on the inner surface of the body-wall, 

 in the posterior segments. 



There was no trace of sexual organs. 



Remarks. — The present form is at once distinguished from 

 the two other species of the genus by the possession of the remark- 

 able oar-like setae in the dorsal bundles. 



